Establishment and maintenance of pregnancy after embryo transfer in ovariectomized mares treated with progesterone. Academic Article uri icon

abstract

  • Pregnancy was established and maintained after embryo transfer in 3 ovariectomized mares treated with progesterone only. Four ovariectomized mares were used as recipients, and 7 transfers were performed. Progesterone in oil, 300 mg i.m. daily, was given starting 5 days before transfer of a 7-day embryo. If the mare was pregnant at 20 days, progesterone treatment was continued to 100 days of gestation. The 3 pregnant mares carried to term and delivered live foals with normal parturition, lactation and maternal behaviour. No differences were seen between pregnant and non-pregnant ovariectomized mares in jugular plasma concentrations of oestrogen, LH or FSH from day of transfer (Day 7) to Day 20. Pregnant ovariectomized mares showed a rise in LH, reflecting production of horse CG, starting at Day 36. Oestrogen values remained low until Day 50.

published proceedings

  • J Reprod Fertil

author list (cited authors)

  • Hinrichs, K., Sertich, P. L., Palmer, E., & Kenney, R. M.

citation count

  • 32

complete list of authors

  • Hinrichs, K||Sertich, PL||Palmer, E||Kenney, RM

publication date

  • July 1987