Dr. Mohd. Amin Beg

Professor
King Abdulaziz University, Saudi Arabia

Highest Degree
PostDoc Fellow in Reproductive Biology and Endocrinology from University of Wisconsin, Madison, USA

My URL
https://livedna.org/91.19198

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Area of Interest:

Biomedical Sciences
Ovarian Follicle
Endocrinology
Reproductive
Theriogenology

Selected Publications

  1. Sheikh, I.A., A. Malik, S.F. AlBasri and M.A. Beg, 2018. In silico identification of genes involved in chronic metabolic acidosis. Life Sci., 192: 246-252.
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  2. Sheikh, I.A., M.A. Beg and M. Yasir, 2017. Molecular interactions of carcinogenic aromatic amines, 4-aminobiphenyl and 4,4'-diaminobiphenyl, with lactoperoxidase-insight to breast cancer. Anticancer Res., 37: 6245-6249.
    Direct Link  |  

  3. Sheikh, I.A., I.A. Tayubi, E. Ahmad, M.A. Ganaie and O.S. Bajouh et al., 2017. Computational insights into the molecular interactions of environmental xenoestrogens 4-tert-octylphenol, 4-nonylphenol, bisphenol A (BPA) and BPA metabolite, 4-methyl-2, 4-bis (4-hydroxyphenyl) pent-1-ene (MBP) with human sex hormone-binding globulin. Ecotoxicol. Environ. Saf., 135: 284-291.
    CrossRef  |  Direct Link  |  

  4. Sheikh, I.A., E.H. Jiffri, M.A. Kamal, G.M. Ashraf and M.A. Beg, 2017. Lactoperoxidase, an antimicrobial milk protein, as a potential activator of carcinogenic heterocyclic amines in breast cancer. Anticancer Res., 37: 6415-6420.
    Direct Link  |  

  5. Sheikh, I.A. and M.A. Beg, 2017. Endocrine disruption: In silico interactions between phthalate plasticizers and corticosteroid binding globulin. J. Applied Toxicol., 37: 1471-1480.
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  6. Mirza, Z. and M.A. Beg, 2017. Possible molecular interactions of bexarotene-a retinoid drug and Alzheimer's Aβ peptide: A docking study. Curr. Alzheimer Res., 14: 327-334.
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  7. Khan, S.A., A. Khan, S.A. Khan, M.A. Beg, A. Ali and G. Damanhouri, 2017. Comparative study of fatty-acid composition of table eggs from the Jeddah food market and effect of value addition in omega-3 bio-fortified eggs. Saudi J. Biol. Sci., 24: 929-935.
    CrossRef  |  Direct Link  |  

  8. Sheikh, I.A., R.F. Turki, A.M. Abuzenadah, G.A. Damanhouri and M.A. Beg, 2016. Endocrine disruption: Computational perspectives on human sex hormone-binding globulin and phthalate plasticizers. PLoS ONE, Vol. 11. 10.1371/journal.pone.0151444.
    CrossRef  |  Direct Link  |  

  9. Sheikh, I.A., M. Yasir, M. Abu-Elmagd, T.A. Dar and A.M. Abuzenadah et al., 2016. Human sex hormone-binding globulin as a potential target of alternate plasticizers: An in silico study. BMC Struct. Biol., Vol. 16. 10.1186/s12900-016-0067-3.
    CrossRef  |  Direct Link  |  

  10. Sheikh, I.A., M. Abu-Elmagd, R.F. Turki, G.A. Damanhouri, M.A. Beg and M. Al-Qahtani, 2016. Endocrine disruption: In silico perspectives of interactions of di-(2-ethylhexyl)phthalate and its five major metabolites with progesterone receptor. BMC Struct. Biol., Vol. 16. 10.1186/s12900-016-0066-4.
    CrossRef  |  Direct Link  |  

  11. Sheikh, I.A., E. Ahmad, M.S. Jamal, M. Rehan and M. Assidi et al., 2016. Spontaneous preterm birth and single nucleotide gene polymorphisms: A recent update. BMC Genom., Vol. 17. 10.1186/s12864-016-3089-0.
    CrossRef  |  Direct Link  |  

  12. Sheikh, I.A., A.A. Khweek and M.A. Beg, 2016. Peroxisome proliferator-activated receptors as potential targets for carcinogenic activity of polychlorinated biphenyls: A computational perspective. Anticancer Res., 36: 6117-6124.
    Direct Link  |  

  13. Rehan, M., E. Ahmad, I.A. Sheikh, A.M. Abuzenadah and G.A. Damanhouri et al., 2015. Androgen and progesterone receptors are targets for bisphenol A (BPA), 4-methyl-2,4-bis-(P-hydroxyphenyl)pent-1-ene-a potent metabolite of BPA and 4-tert-octylphenol: A computational insight. PLoS ONE, Vol. 10. 10.1371/journal.pone.0138438.
    CrossRef  |  Direct Link  |  

  14. Rehan, M., M.A. Beg, S. Parveen, G.A. Damanhouri and G.F. Zaher, 2014. Computational insights into the inhibitory mechanism of human AKT1 by an orally active inhibitor, MK-2206. PLoS ONE, Vol. 9. 10.1371/journal.pone.0109705.
    CrossRef  |  Direct Link  |  

  15. Jamal, M.S., S. Parveen, M.A. Beg, M. Suhail and A.G. Chaudhary et al., 2014. Anticancer compound plumbagin and its molecular targets: A structural insight into the inhibitory mechanisms using computational approaches. PLoS ONE, Vol. 9. 10.1371/journal.pone.0087309.
    CrossRef  |  Direct Link  |  

  16. Bergfelt, D.R., A.T. Peter and M.A. Beg, 2014. Relaxin: A hormonal aid to diagnose pregnancy status in wild mammalian species. Theriogenology, 82: 1187-1198.
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  17. Santos, V.G., M.A. Beg, E.M. Bettencourt and O. Ginther, 2013. Role of PGF2α in luteolysis based on inhibition of PGF2α synthesis in the mare. Theriogenology, 80: 812-820.
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  18. Ginther, O.J., V.G. Santos, R.A. Mir and M.A. Beg, 2013. Progesterone concentration when the future ovulatory follicle and corpus luteum are located in ipsilateral or contralateral ovaries in heifers. Theriogenology, 79: 534-540.
    CrossRef  |  

  19. Ginther, O.J., S.T. Bashir, V.G. Santos and M.A. Beg, 2013. Contralateral ovarian location between the future ovulatory follicle and extant corpus luteum increases the length of the luteal phase and number of follicular waves in heifers. Theriogenology, 79: 1130-1138.
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  20. Ginther, O.J., S.T. Bashir, R.A. Mir, V.G. Santos and M.A. Beg, 2013. Interrelationships among progesterone, LH and luteal blood flow during a pulse of a PGF 2α metabolite and functional role of LH in the progesterone rebound in heifers. Theriogenology, 79: 1110-1119.
    CrossRef  |  Direct Link  |  

  21. Ginther, O.J., S.T. Bashir, M.M. Hoffman and M.A. Beg, 2013. Endocrinology of number of follicular waves per estrous cycle and contralateral or ipsilateral relationship between corpus luteum and preovulatory follicle in heifers. Domest. Anim. Endocrinol., 45: 64-71.
    CrossRef  |  Direct Link  |  

  22. Ginther, O.J., F.L.V. Pinaffi, F.A. Khan, L.F. Duarte and M.A. Beg, 2013. Follicular-phase concentrations of progesterone, estradiol-17β, LH, FSH and a PGF2α metabolite and daily clustering of prolactin pulses, based on hourly blood sampling and hourly detection of ovulation in heifers. Theriogenology, 79: 918-928.
    CrossRef  |  Direct Link  |  

  23. Ginther, O.J., F.L.V. Pinaffi, F.A. Khan, L.F. Duarte and M.A. Beg, 2013. Circadian influence on the preovulatory LH surge, ovulation and prolactin concentrations in heifers. Theriogenology, 79: 528-533.
    CrossRef  |  

  24. Shrestha, H.K., M.A. Beg, R.R. Burnette and O.J. Ginther, 2012. Plasma clearance and half-life of prostaglandin F2alpha: A comparison between mares and heifers. Biol. Reprod., Vol. 87, No. 1. 10.1095/biolreprod.112.100776.
    CrossRef  |  Direct Link  |  

  25. Pugliesi, G., M.A. Beg, G.R. Carvalho and O.J. Ginther, 2012. Induction of PGFM pulses and luteolysis by sequential estradiol-17β treatments in heifers. Theriogenology, 77: 492-506.
    CrossRef  |  Direct Link  |  

  26. Pugliesi, G., F.A. Khan, M.A. Hannan, M.A. Beg, G.R. Carvalho and O.J. Ginther, 2012. Inhibition of prostaglandin biosynthesis during postluteolysis and effects on CL regression, prolactin and ovulation in heifers. Theriogenology, 78: 443-454.
    CrossRef  |  Direct Link  |  

  27. Pinaffi, F.L.V., G. Pugliesi, M.A. Hannan, L.A. Silva, M.A. Beg and O.J. Ginther, 2012. Direct effect of PGF2α pulses on PRL pulses, based on inhibition of PRL or PGF2α secretion in heifers. Theriogenology, 78: 678-687.
    CrossRef  |  Direct Link  |  

  28. Pinaffi, F.L.V., F.A. Khan, L.A. Silva, M.A. Beg and O.J. Ginther, 2012. Ovarian and PGF2α responses to stimulation of endogenous PRL pulses during the estrous cycle in mares. Theriogenology, 78: 1252-1261.
    CrossRef  |  Direct Link  |  

  29. Khan, F.A., F.L.V. Pinaffi, M.A. Beg and O.J. Ginther, 2012. Unilateral ablation of follicles ≥ 4 mm leads to compensatory follicle response from the contralateral ovary in heifers. Theriogenology, 77: 1605-1614.
    CrossRef  |  Direct Link  |  

  30. Ginther, O.J., V.G. Santos, R.A. Mir and M.A. Beg, 2012. Role of LH in the progesterone increase during the bromocriptine-induced prolactin decrease in heifers. Theriogenology, 78: 1969-1976.
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  31. Ginther, O.J., F.L.V. Pinaffi, M.B. Rodriguez, L.F. Duarte and M.A. Beg, 2012. Stimulatory effect of PGF2α on PRL based on experimental inhibition of each hormone in mares. Theriogenology, 78: 1960-1968.
    CrossRef  |  Direct Link  |  

  32. Ginther, O.J., F.L.V. Pinaffi, L.A. Silva and M.A. Beg, 2012. Temporal relationships of a pulse of prolactin (PRL) to a pulse of a metabolite of PGF2α in mares. Theriogenology, 77: 99-107.
    CrossRef  |  Direct Link  |  

  33. Ginther, O.J., F.A. Khan, M.A. Hannan, M.B. Rodriguez, G. Pugliesi and M.A. Beg, 2012. Role of LH in luteolysis and growth of the ovulatory follicle and estradiol regulation of LH secretion in heifers. Theriogenology, 77: 1442-1452.
    CrossRef  |  Direct Link  |  

  34. Ginther, O.J., F.A. Khan, M.A. Hannan and M.A. Beg, 2012. Temporal interrelationships at 15-min intervals among oxytocin, LH and progesterone during a pulse of a prostaglandin F2α metabolite in heifers. Anim. Reprod. Sci., 133: 63-70.
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  35. Ginther, O.J. and M.A. Beg, 2012. The hour of transition into luteolysis in horses and cattle: A species comparison. Theriogenology, 77: 1731-1740.
    CrossRef  |  Direct Link  |  

  36. Ginther, O.J. and M.A. Beg, 2012. Stimulation of a pulse of LH and reduction in PRL concentration by a physiologic dose of GnRH before, during and after luteolysis in heifers. Anim. Reprod. Sci., 133: 52-62.
    CrossRef  |  Direct Link  |  

  37. Ginther, O.J. and M.A. Beg, 2012. Dynamics of circulating progesterone concentrations before and during luteolysis: A comparison between cattle and horses. Biol. Reprod., Vol. 86, No. 6. 10.1095/biolreprod.112.099820.
    CrossRef  |  Direct Link  |  

  38. Shrestha, H.K., G. Pugliesi, M.A. Beg and O.J. Ginther, 2011. Role of luteinizing hormone in changes in concentrations of progesterone and luteal blood flow during the hours of a simulated pulse of 13,14-dihydro-15-keto-prostaglandin F2alpha (PGFM) in heifers. Biol. Reprod., 85: 482-489.
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  39. Pugliesi, G., M.A. Beg, G.R. Carvalho and O.J. Ginther, 2011. Effect of dose of estradiol-17β on prominence of an induced 13,14-dihydro-15-keto-PGF2α (PGFM) pulse and relationship of prominence to progesterone, LH and luteal blood flow in heifers. Domest. Anim. Endocrinol., 41: 98-109.
    CrossRef  |  Direct Link  |  

  40. Pugliesi, G., H.K. Shrestha, M.A. Hannan, G.R. Carvalho, M.A. Beg and O.J. Ginther, 2011. Effects of inhibition of prostaglandin F2α biosynthesis during preluteolysis and luteolysis in heifers. Theriogenology, 76: 640-651.
    CrossRef  |  Direct Link  |  

  41. Ginther, O.J., M.J. Fuenzalida, M.A. Hannan and M.A. Beg, 2011. Pulsatility and interrelationships of 13,14-dihydro-15-keto-PGF2alpha (PGFM), luteinizing hormone, progesterone and estradiol in heifers. Biol. Reprod., 84: 922-932.
    CrossRef  |  Direct Link  |  

  42. Ginther, O.J., M.J. Fuenzalida, H.K. Shrestha and M.A. Beg, 2011. The transition between preluteolysis and luteolysis in cattle. Theriogenology, 75: 164-171.
    CrossRef  |  Direct Link  |  

  43. Ginther, O.J., M.J. Fuenzalida, H.K. Shrestha and M.A. Beg, 2011. Concomitance of luteinizing hormone and progesterone oscillations during the transition from preluteolysis to luteolysis in cattle. Domest. Anim. Endocrinol., 40: 77-86.
    CrossRef  |  Direct Link  |  

  44. Ginther, O.J., M.J. Fuenzalida, G. Pugliesi, M.A. Hannan and M.A. Beg, 2011. Effect of luteinizing hormone oscillations on progesterone concentrations based on treatment with a gonadotropin-releasing hormone antagonist in heifers. Domest. Anim. Endocrinol., 40: 119-127.
    CrossRef  |  Direct Link  |  

  45. Ginther, O.J., M.B. Rodriguez and M.A. Beg, 2011. Concentrations of circulating hormones during the interval between pulses of a PGF2α metabolite in mares and heifers. Anim. Reprod. Sci., 128: 22-28.
    CrossRef  |  Direct Link  |  

  46. Ginther, O.J., M.A. Hannan and M.A. Beg, 2011. Luteolysis and associated interrelationships among circulating PGF2α, progesterone, LH and estradiol in mares. Domest. Anim. Endocrinol., 41: 174-184.
    CrossRef  |  Direct Link  |  

  47. Ginther, O.J., J. Cuervo-Arango and M.A. Beg, 2011. Disruption of periovulatory FSH and LH surges during induced anovulation by an inhibitor of prostaglandin synthesis in mares. Anim. Reprod. Sci., 126: 91-95.
    CrossRef  |  Direct Link  |  

  48. Ginther, O.J. and M.A. Beg, 2011. Pulses of prolactin before, during and after luteolysis and synchrony with pulses of a metabolite of prostaglandin F2α in heifers. Anim. Reprod. Sci., 128: 29-36.
    CrossRef  |  Direct Link  |  

  49. Ginther, O.J. and M.A. Beg, 2011. Hormone concentration changes temporally associated with the hour of transition from preluteolysis to luteolysis in mares. Anim. Reprod. Sci., 129: 67-72.
    CrossRef  |  Direct Link  |  

  50. Cuervo-Arango, J., M.A. Beg and O.J. Ginther, 2011. Follicle and systemic hormone interrelationships during induction of luteinized unruptured follicles with a prostaglandin inhibitor in mares. Theriogenology, 76: 361-373.
    CrossRef  |  Direct Link  |  

  51. Siddiqui, M.A.R., J.C. Ferreira, E.L. Gastal, M.A. Beg, D.A. Cooper and O.J. Ginther, 2010. Temporal relationships of the LH surge and ovulation to echotexture and power Doppler signals of blood flow in the wall of the preovulatory follicle in heifers. Reprod. Fertil. Dev., 22: 1110-1117.
    CrossRef  |  Direct Link  |  

  52. Shrestha, H.K., M.A. Beg, S. Imam and O.J. Ginther, 2010. Luteal blood flow and concentrations of circulating progesterone and other hormones associated with a simulated pulse of 13,14-dihydro-15-keto-prostaglandin F2α in heifers. Reproduction, 139: 673-683.
    CrossRef  |  Direct Link  |  

  53. Shrestha, H.K., M.A. Beg, M.A.R. Siddiqui and O.J. Ginther, 2010. Dynamic progesterone responses to simulation of a natural pulse of a metabolite of prostaglandin F2α in heifers. Anim. Reprod. Sci., 118: 118-123.
    CrossRef  |  Direct Link  |  

  54. Shahiduzzaman, A.K.M., M.A. Beg, M.P. Palhao, M.A.R. Siddiqui, M. Shamsuddin and O.J. Ginther, 2010. Stimulation of the largest subordinate follicle by intrafollicular treatment with insulin-like growth factor 1 is associated with inhibition of the dominant follicle in heifers. Theriogenology, 74: 194-201.
    CrossRef  |  Direct Link  |  

  55. Palhao, M.P., M.A. Beg, M.T. Rodrigues and O.J. Ginther, 2010. Role of increased estradiol on altering the follicle diameters and gonadotropin concentrations that have been reported for double-ovulating heifers. Anim. Reprod. Sci., 122: 335-341.
    CrossRef  |  Direct Link  |  

  56. Imam, S., H.K. Shrestha, M.A. Beg and O.J. Ginther, 2010. Intrapulse changes in progesterone and LH concentrations and luteal blood flow during an estradiol-induced pulse of a metabolite of prostaglandin F2α in heifers. Anim. Reprod. Sci., 121: 34-38.
    CrossRef  |  Direct Link  |  

  57. Hannan, M.A., M.J. Fuenzalida, M.A.R. Siddiqui, M. Shamsuddin, M.A. Beg and O.J. Ginther, 2010. Diurnal variation in LH and temporal relationships between oscillations in LH and progesterone during the luteal phase in heifers. Theriogenology, 74: 1491-1498.
    CrossRef  |  

  58. Ginther, O.J., M. Almamun, A.K.M. Shahiduzzaman and M.A. Beg, 2010. Disruption of the periovulatory LH surge by a transient increase in circulating 17β-estradiol at the time of ovulation in mares. Anim. Reprod. Sci., 117: 178-182.
    CrossRef  |  Direct Link  |  

  59. Ginther, O.J., H.K. Shrestha, M.J. Fuenzalida, S. Imam and M.A. Beg, 2010. Stimulation of pulses of 13,14-dihydro-15-keto-PGF2α (PGFM) with estradiol-17β and changes in circulating progesterone concentrations within a PGFM pulse in heifers. Theriogenology, 74: 384-392.
    CrossRef  |  Direct Link  |  

  60. Ginther, O.J., H.K. Shrestha, M.J. Fuenzalida, A.K.M. Shahiduzzaman, M.A. Hannan and M.A. Beg, 2010. Intrapulse temporality between pulses of a metabolite of prostaglandin F2α and circulating concentrations of progesterone before, during and after spontaneous luteolysis in heifers. Theriogenology, 74: 1179-1186.
    CrossRef  |  Direct Link  |  

  61. Ginther, O.J., H.K. Shrestha, M.J. Fuenzalida, A.K.M. Shahiduzzaman and M.A. Beg, 2010. Characteristics of pulses of 13,14-dihydro-15-keto-prostaglandin F2alpha before, during and after spontaneous luteolysis and temporal intrapulse relationships with progesterone concentrations in cattle. Biol. Reprod., 82: 1049-1056.
    CrossRef  |  Direct Link  |  

  62. Ginther, O.J., H.K. Shrestha and M.A. Beg, 2010. Circulating hormone concentrations within a pulse of a metabolite of prostaglandin F2α during preluteolysis and early luteolysis in heifers. Anim. Reprod. Sci., 122: 253-258.
    CrossRef  |  Direct Link  |  

  63. Gastal, M.O., E.L. Gastal, M.A. Beg and O.J. Ginther, 2010. Short-term feed restriction decreases the systemic and intrafollicular concentrations of leptin and increases the vascularity of the preovulatory follicle in mares. Theriogenology, 73: 1202-1209.
    CrossRef  |  

  64. Checura, C.M., M.A. Beg, J.J. Parrish and O.J. Ginther, 2010. Positive effect of FSH but not LH on early development of the dominant follicle in mares. Reprod. Fertil. Dev., 22: 1092-1099.
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  65. Checura, C.M., M.A. Beg, J.J. Parrish and O.J. Ginther, 2010. Functional relationships among intrafollicular insulin-like growth factor 1, circulatory gonadotropins and development of the dominant follicle in mares. Anim. Reprod. Sci., 118: 270-278.
    CrossRef  |  Direct Link  |  

  66. Beg, M.A. and D.R. Bergfelt, 2010. Diagnostic Ultrasonography: Folliculogenesis. In: Equine Reproduction, McKinnon, O.A., E.L. Squares, W.E. Vaala and D.D. Varner (Eds.). Wiley-Blackwell Publishing, Ames, IA., USA., ISBN-13: 9780470961872, pp: 2009-2019.

  67. Siddiqui, M.A.R., E.L. Gastal, M.O. Gastal, M.A. Beg and O.J. Ginther, 2009. Effect of hCG in the presence of hCG antibodies on the follicle, hormone concentrations and oocyte in mares. Reprod. Domest. Anim., 44: 474-479.
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  68. Siddiqui, M.A.R., E.L. Gastal, J.C. Ju, M.O. Gastal, M.A. Beg and O.J. Ginther, 2009. Nuclear configuration, spindle morphology and cytoskeletal organization of in vivo maturing horse oocytes. Reprod. Domest. Anim., 44: 435-440.
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  69. Siddiqui, M.A., E.L. Gastal, M.O. Gastal, M. Almamun, M.A. Beg and O.J. Ginther, 2009. Relationship of vascular perfusion of the wall of the preovulatory follicle to in vitro fertilisation and embryo development in heifers. Reproduction, 137: 689-697.
    CrossRef  |  Direct Link  |  

  70. Palhao, M.P., M.A. Beg, M.T. Rodrigues and O.J. Ginther, 2009. Follicle and hormone dynamics in single versus double ovulating heifers. Reproduction, 138: 561-570.
    CrossRef  |  Direct Link  |  

  71. Jacob, J.C., E.L. Gastal, M.O. Gastal, G.R. Carvalho, M.A. Beg and O.J. Ginther, 2009. Temporal relationships and repeatability of follicle diameters and hormone concentrations within individuals in mares. Reprod. Domest. Anim., 44: 92-99.
    CrossRef  |  Direct Link  |  

  72. Jacob, J.C., E.L. Gastal, M.O. Gastal, G.R. Carvalho, M.A. Beg and O.J. Ginther, 2009. Follicle deviation in ovulatory follicular waves with one or two dominant follicles in mares. Reprod. Domest. Anim., 44: 248-254.
    CrossRef  |  Direct Link  |  

  73. Ginther, O.J., R.R. Araujo, M.P. Palhao, B.L. Rodrigues and M.A. Beg, 2009. Necessity of sequential pulses of prostaglandin F2alpha for complete physiologic luteolysis in cattle. Biol. Reprod., 80: 641-648.
    CrossRef  |  Direct Link  |  

  74. Ginther, O.J., R.R. Araujo, B.L. Rodrigues and M.A. Beg, 2009. Luteal function and blood flow during intravenous infusion of prostaglandin F2α in heifers. Anim. Reprod., 6: 400-408.

  75. Ginther, O.J., M.O. Gastal, E.L. Gastal, J.C. Jacob and M.A. Beg, 2009. Age-related dynamics of follicles and hormones during an induced ovulatory follicular wave in mares. Theriogenology, 71: 780-788.
    CrossRef  |  Direct Link  |  

  76. Ginther, O.J., M.A.R. Siddiqui and M.A. Beg, 2009. Progesterone responses to intravenous and intrauterine infusions of prostaglandin F2α in mares. Reprod. Fertil. Dev., 21: 688-695.
    CrossRef  |  Direct Link  |  

  77. Ginther, O.J., M.A.R. Siddiqui and M.A. Beg, 2009. Physiologic and nonphysiologic effects of exogenous prostaglandin F2α on reproductive hormones in mares. Theriogenology, 72: 417-424.
    CrossRef  |  Direct Link  |  

  78. Ginther, O.J., M.A. Beg, E.L. Gastal, M.O. Gastal and D.A. Cooper, 2009. Treatment with Human Chorionic Gonadotropin (hCG) for ovulation induction is associated with an immediate 17β-estradiol decrease and a more rapid LH increase in mares. Anim. Reprod. Sci., 114: 311-317.
    CrossRef  |  Direct Link  |  

  79. Ginther, O.J., J.C. Jacob, M.O. Gastal, E.L. Gastal and M.A. Beg, 2009. Development of one vs multiple ovulatory follicles and associated systemic hormone concentrations in mares. Reprod. Domest. Anim., 44: 441-449.
    CrossRef  |  Direct Link  |  

  80. Ginther, O.J., E.L. Gastal, M.O. Gastal, L.F. Duarte and M.A. Beg, 2009. Follicle suppression of circulating follicle-stimulating hormone and luteinizing hormone before versus after emergence of the ovulatory wave in mares. Theriogenology, 72: 445-452.
    CrossRef  |  Direct Link  |  

  81. Ginther, O.J. and M.A. Beg, 2009. Concentrations of circulating hormones normalized to pulses of a prostaglandin F2α metabolite during spontaneous luteolysis in mares. Theriogenology, 72: 1111-1119.
    CrossRef  |  Direct Link  |  

  82. Checura, C.M., M.A. Beg, E.L. Gastal, M.O. Gastal, M.C. Wiltbank, J.J. Parrish and O.J. Ginther, 2009. Effect of suppression of FSH with a GnRH antagonist (acyline) before and during follicle deviation in the mare. Reprod. Domest. Anim., 44: 504-511.
    CrossRef  |  Direct Link  |  

  83. Araujo, R.R., O.J. Ginther, J.C. Ferreira, M.M. Palhao, M.A. Beg and M.C. Wiltbank, 2009. Role of follicular estradiol-17beta in timing of luteolysis in heifers. Biol. Reprod., 81: 426-437.
    CrossRef  |  Direct Link  |  

  84. Ginther, O.J., M.O. Gastal, E.L. Gastal, J.C. Jacob, M.A.R. Siddiqui and M.A. Beg, 2008. Effects of age on follicle and hormone dynamics during the oestrous cycle in mares. Reprod. Fertil. Dev., 20: 955-963.
    CrossRef  |  Direct Link  |  

  85. Ginther, O.J., M.O. Gastal, E.L. Gastal, J.C. Jacob and M.A. Beg, 2008. Induction of haemorrhagic anovulatory follicles in mares. Reprod. Fertil. Dev., 20: 947-954.
    CrossRef  |  Direct Link  |  

  86. Ginther, O.J., M.A. Beg, A.P. Neves, R.C. Mattos, B.P.L. Petrucci, M.O. Gastal and E.L. Gastal, 2008. Miniature ponies: 2. Endocrinology of the oestrous cycle. Reprod. Fertil. Dev., 20: 386-390.
    CrossRef  |  Direct Link  |  

  87. Ginther, O.J., J.C. Jacob, M.O. Gastal, E.L. Gastal and M.A. Beg, 2008. Follicle and systemic hormone interrelationships during spontaneous and ablation-induced ovulatory waves in mares. Anim. Reprod. Sci., 106: 181-187.
    CrossRef  |  Direct Link  |  

  88. Ginther, O.J., E.L. Gastal, M.O. Gastal and M.A. Beg, 2008. Passage of postovulatory follicular fluid into the peritoneal cavity and the effect on concentrations of circulating hormones in mares. Anim. Reprod. Sci., 107: 1-8.
    CrossRef  |  Direct Link  |  

  89. Ginther, O.J., E.L. Gastal, M.O. Gastal and M.A. Beg, 2008. Intrafollicular effect of IGF1 on development of follicle dominance in mares. Anim. Reprod. Sci., 105: 417-423.
    CrossRef  |  Direct Link  |  

  90. Ginther, O.J., E.L. Gastal, M.O. Gastal and M.A. Beg, 2008. Dynamics of the equine preovulatory follicle and periovulatory hormones: What's new? J. Equine Vet. Sci., 28: 454-460.
    CrossRef  |  Direct Link  |  

  91. Ginther, O.J., E.L. Gastal, B.L. Rodrigues, M.O. Gastal and M.A. Beg, 2008. Follicle diameters and hormone concentrations in the development of single versus double ovulations in mares. Theriogenology, 69: 583-590.
    CrossRef  |  Direct Link  |  

  92. Ginther, O.J., B.L. Rodrigues, J.C. Ferreira, R.R. Araujo and M.A. Beg, 2008. Characterisation of pulses of 13,14-dihydro-15-keto-PGF2alpha (PGFM) and relationships between PGFM pulses and luteal blood flow before, during and after luteolysis in mares. Reprod. Fertil. Dev., 20: 684-693.
    CrossRef  |  Direct Link  |  

  93. Gastal, E.L., M.O. Gastal, M.A. Beg, A.P. Neves, B.P.L. Petrucci, R.C. Mattos and O.J. Ginther, 2008. Miniature ponies: Similarities and differences from larger breeds in follicles and hormones during the estrous cycle. J. Equine Vet. Sci., 28: 508-517.
    CrossRef  |  Direct Link  |  

  94. Ginther, O.J., M.D. Utt, M.A. Beg, E.L. Gastal and M.O. Gastal, 2007. Negative effect of estradiol on luteinizing hormone throughout the ovulatory luteinizing hormone surge in mares. Biol. Reprod., 77: 543-550.
    CrossRef  |  Direct Link  |  

  95. Ginther, O.J., M.D. Utt and M.A. Beg, 2007. Follicle deviation and diurnal variation in circulating hormone concentrations in mares. Anim. Reprod. Sci., 100: 197-203.
    CrossRef  |  Direct Link  |  

  96. Ginther, O.J., L.A. Silva, R.R. Araujo and M.A. Beg, 2007. Temporal associations among pulses of 13,14-dihydro-15-keto-PGF2alpha, luteal blood flow and luteolysis in cattle. Biol. Reprod., 76: 506-513.
    CrossRef  |  Direct Link  |  

  97. Ginther, O.J., E.L. Gastal, M.O. Gastal, M.D. Utt and M.A. Beg, 2007. Luteal blood flow and progesterone production in mares. Anim. Reprod. Sci., 99: 213-220.
    CrossRef  |  Direct Link  |  

  98. Ginther, O.J., E.L. Gastal, M.O. Gastal, M.A.R. Siddiqui and M.A. Beg, 2007. Relationships of follicle versus oocyte maturity to ultrasound morphology, blood flow and hormone concentrations of the preovulatory follicle in mares. Biol. Reprod., 77: 202-208.
    CrossRef  |  Direct Link  |  

  99. Ginther, O.J., E.L. Gastal, M.O. Gastal and M.A. Beg, 2007. Incidence, endocrinology, vascularity and morphology of hemorrhagic anovulatory follicles in mares. J. Equine Vet. Sci., 27: 130-139.
    CrossRef  |  Direct Link  |  

  100. Ginther, O.J., E.L. Gastal, M.O. Gastal and M.A. Beg, 2007. Effect of prostaglandin F2α on ovarian, adrenal and pituitary hormones and on luteal blood flow in mares. Domest. Anim. Endocrinol., 32: 315-328.
    CrossRef  |  Direct Link  |  

  101. Gastal, M.O., E.L. Gastal, M.A. Beg and O.J. Ginther, 2007. Stallion-like behavior in mares: Review of incidence, characteristics, ovarian activity and role of testosterone. J. Equine Vet. Sci., 27: 390-393.
    CrossRef  |  Direct Link  |  

  102. Gastal, M.O., E.L. Gastal, M.A. Beg and O.J. Ginther, 2007. Elevated plasma testosterone concentrations during stallion-like sexual behavior in mares (Equus caballus). Hormones Behav., 52: 205-210.
    CrossRef  |  Direct Link  |  

  103. Gastal, E.L., M.O. Gastal, F.X. Donadeu, T.J. Acosta, M.A. Beg and O.J. Ginther, 2007. Temporal relationships among LH, estradiol and follicle vascularization preceding the first compared with later ovulations during the year in mares. Anim. Reprod. Sci., 102: 314-321.
    CrossRef  |  Direct Link  |  

  104. Silva, L.A., E.L. Gastal, M.O. Gastal, M.A. Beg and O.J. Ginther, 2006. Relationship between vascularity of the preovulatory follicle and establishment of pregnancy in mares. Anim. Reprod., 3: 339-346.
    Direct Link  |  

  105. Ginther, O.J., M.D. Utt, D.R. Bergfelt and M.A. Beg, 2006. Controlling interrelationships of progesterone/LH and estradiol/LH in mares. Anim. Reprod. Sci., 95: 144-150.
    CrossRef  |  Direct Link  |  

  106. Ginther, O.J., E.L. Gastal, M.O. Gastal and M.A. Beg, 2006. Conversion of a viable preovulatory follicle into a hemorrhagic anovulatory follicle in mares. Anim. Reprod., 3: 29-40.
    Direct Link  |  

  107. Beg, M.A. and O.J. Ginther, 2006. Follicle selection in cattle and horses: Role of intrafollicular factors. Reproduction, 132: 365-377.
    CrossRef  |  Direct Link  |  

  108. Silva, L.A., E.L. Gastal, M.A. Beg and O.J. Ginther, 2005. Changes in vascular perfusion of the endometrium in association with changes in location of the embryonic vesicle in mares. Biol. Reprod., 72: 755-761.
    CrossRef  |  Direct Link  |  

  109. Ginther, O.J., M.A. Beg, E.L. Gastal, M.O. Gastal, A.R. Baerwald and R.A. Pierson, 2005. Systemic concentrations of hormones during the development of follicular waves in mares and women: A comparative study. Reproduction, 130: 379-388.
    CrossRef  |  Direct Link  |  

  110. Ginther, O.J., E.L. Gastal, M.O. Gastal and M.A. Beg, 2005. Regulation of circulating gonadotropins by the negative effects of ovarian hormones in mares. Biol. Reprod., 73: 315-323.
    CrossRef  |  Direct Link  |  

  111. Ginther, O.J., E.L. Gastal, M.O. Gastal and M.A. Beg, 2005. In vivo effects of pregnancy-associated plasma protein-A, activin-A and vascular endothelial growth factor on other follicular-fluid factors during follicle deviation in mares. Reproduction, 129: 489-496.
    CrossRef  |  Direct Link  |  

  112. Gastal, E.L., B.L. Rodrigues, M.O. Gastal, M.A. Beg and O.J. Ginther, 2005. Responsiveness of the early corpus luteum to PGF2α and resulting progesterone, LH and FSH interrelationships in mares. Anim. Reprod., 2: 240-249.
    Direct Link  |  

  113. Beg, M.A., E.L. Gastal, M.O. Gastal, S. Ji, M.C. Wiltbank and O.J. Ginther, 2005. Changes in steady-state concentrations of messenger ribonucleic acids in luteal tissue during prostaglandin F2α induced luteolysis in mares. Anim. Reprod. Sci., 90: 273-285.
    CrossRef  |  Direct Link  |  

  114. Acosta, T.A., M.A. Beg and O.J. Ginther, 2005. Effects of modified FSH surges on follicle selection and codominance in heifers. Anim. Reprod., 2: 28-40.
    Direct Link  |  

  115. Ginther, O.J., M.A. Beg, M.O. Gastal and E.L. Gastal, 2004. Follicle dynamics and selection in mares. Anim. Reprod., 1: 45-63.
    Direct Link  |  

  116. Ginther, O.J., E.L. Gastal, M.O. Gastal, C.M. Checura and M.A. Beg, 2004. Dose-response study of intrafollicular injection of insulin-like growth factor-I on follicular fluid factors and follicle dominance in mares. Biol. Reprod., 70: 1063-1069.
    CrossRef  |  Direct Link  |  

  117. Ginther, O.J., E.L. Gastal, M.O. Gastal and M.A. Beg, 2004. Seasonal influence on equine follicle dynamics. Anim. Reprod., 1: 31-44.
    Direct Link  |  

  118. Ginther, O.J., E.L. Gastal, M.O. Gastal and M.A. Beg, 2004. Critical role of insulin-like growth factor system in follicle selection and dominance in mares. Biol. Reprod., 70: 1374-1379.
    CrossRef  |  Direct Link  |  

  119. Ginther, O.J., D.R. Bergfelt, M.A. Beg, C. Meira and K. Kot, 2004. In vivo effects of an intrafollicular injection of insulin-like growth factor 1 on the mechanism of follicle deviation in heifers and mares. Biol. Reprod., 70: 99-105.
    CrossRef  |  Direct Link  |  

  120. Gastal, E.L., M.O. Gastal, M.A. Beg and O.J. Ginther, 2004. Interrelationships among follicles during the common-growth phase of a follicular wave and capacity of individual follicles for dominance in mares. Reproduction, 128: 417-422.
    CrossRef  |  Direct Link  |  

  121. Acosta, T.J., M.A. Beg and O.J. Ginther, 2004. Aberrant blood flow area and plasma gonadotropin concentrations during the development of dominant-sized transitional anovulatory follicles in mares. Biol. Reprod., 71: 637-642.
    CrossRef  |  Direct Link  |  

  122. Acosta, T.J., E.L. Gastal, M.O. Gastal, M.A. Beg and O.J. Ginther, 2004. Differential blood flow changes between the future dominant and subordinate follicles precede diameter changes during follicle selection in mares. Biol. Reprod., 71: 502-507.
    CrossRef  |  Direct Link  |  

  123. Ginther, O.J., M.A. Beg, K. Kot, C.D. Meira and D.R. Bergfelt, 2003. Associated and independent comparisons between the two largest follicles preceding follicle deviation in cattle. Biol. Reprod., 68: 524-529.
    CrossRef  |  Direct Link  |  

  124. Ginther, O.J., M.A. Beg, F.X. Donadeu and D.R. Bergfelt, 2003. Mechanism of follicle deviation in monovular farm species. Anim. Reprod. Sci., 78: 239-257.
    CrossRef  |  Direct Link  |  

  125. Ginther, O.J., B.G. Woods, C. Meira, M.A. Beg and D.R. Bergfelt, 2003. Hormonal mechanism of follicle deviation as indicated by major versus minor follicular waves during the transition into the anovulatory season in mares. Reproduction, 126: 653-660.
    CrossRef  |  Direct Link  |  

  126. Bergfelt, D.R., L.H. Sego, M.A. Beg and O.J. Ginther, 2003. Calculated follicle deviation using segmented regression for modeling diameter differences in cattle. Theriogenology, 59: 1811-1825.
    CrossRef  |  Direct Link  |  

  127. Beg, M.A., C. Meira, D.R. Bergfelt and O.J. Ginther, 2003. Role of oestradiol in growth of follicles and follicle deviation in heifers. Reproduction, 125: 847-854.
    CrossRef  |  Direct Link  |  

  128. Ginther, O.J., M.A. Beg, D.R. Bergfelt and K. Kot, 2002. Activin A, estradiol and free insulin-like growth factor I in follicular fluid preceding the experimental assumption of follicle dominance in cattle. Biol. Reprod., 67: 14-19.
    CrossRef  |  Direct Link  |  

  129. Ginther, O.J., D.R. Bergfelt, M.A. Beg and K. Kot, 2002. Role of low circulating FSH concentrations in controlling the interval to emergence of the subsequent follicular wave in cattle. Reproduction, 124: 475-482.
    CrossRef  |  Direct Link  |  

  130. Ginther, O.J., C. Meira, M.A. Beg and D.R. Bergfelt, 2002. Follicle and endocrine dynamics during experimental follicle deviation in mares. Biol. Reprod., 67: 862-867.
    CrossRef  |  Direct Link  |  

  131. Beg, M.A., D.R. Bergfelt, K. Kot and O.J. Ginther, 2002. Follicle selection in cattle: Dynamics of follicular fluid factors during development of follicle dominance. Biol. Reprod., 66: 120-126.
    CrossRef  |  Direct Link  |  

  132. Ginther, O.J., M.A. Beg, D.R. Bergfelt, F.X. Donadeu and K. Kot, 2001. Follicle selection in monovular species. Biol. Reprod., 65: 638-647.
    CrossRef  |  Direct Link  |  

  133. Ginther, O.J., D.R. Bergfelt, M.A. Beg and K. Kot, 2001. Follicle selection in cattle: Role of luteinizing hormone. Biol. Reprod., 64: 197-205.
    CrossRef  |  Direct Link  |  

  134. Ginther, O.J., D.R. Bergfelt, M.A. Beg and K. Kot, 2001. Follicle selection in cattle: Relationships among growth rate, diameter ranking and capacity for dominance. Biol. Reprod., 65: 345-350.
    CrossRef  |  Direct Link  |  

  135. Ginther, O.J., D.R. Bergfelt, M.A. Beg and K. Kot, 2001. Effect of LH on circulating oestradiol and follicular fluid factor concentrations during follicle deviation in cattle. Reproduction, 122: 103-110.
    CrossRef  |  Direct Link  |  

  136. Beg, M.A., D.R. Bergfelt, K. Kot, M.C. Wiltbank and O.J. Ginther, 2001. Follicular-fluid factors and granulosa-cell gene expression associated with follicle deviation in cattle. Biol. Reprod., 64: 432-441.
    CrossRef  |  Direct Link  |  

  137. Beg, M.A. and S.M. Totey, 1999. The oestrous cycle, oestrous behaviour and the endocrinology of the oestrous cycle in the buffalo (Bubalus bubalis). Anim. Breed. Abstr., 67: 329-337.

  138. Beg, M.A., P.C. Sanwal and M.C. Yadav, 1997. Ovarian response and endocrine changes in buffalo superovulated at midluteal and late luteal stage of the estrous cycle: A preliminary report. Theriogenology, 47: 423-432.
    CrossRef  |  Direct Link  |  

  139. Beg, M.A., P.C. Sanwal and M.C. Yadav, 1996. Steroid hormone profile and superovulatory response following priming and GnRH treatment in buffaloes. Anim. Reprod. Sci., 44: 33-39.
    CrossRef  |  Direct Link  |  

  140. Beg, M.A., P.C. Sanwal and M.C. Yadav, 1996. Steroid hormone profile and ovulatory response in buffaloes superovulated with Ovagen. Buffalo J., 12: 47-55.
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