Superovulation treatments and embryo transfer in Angora goats

Journal of Reproduction and Fertility
D T ArmstrongR F Seamark

Abstract

A high incidence of early luteal regression after PMSG superovulation was associated with low recovery of embryos from reproductive tracts of Angora goats flushed later than Day 5 after onset of oestrus. Embryos were successfully recovered (mean 7.9/female) by flushing on Days 2-5. Mean ovulation rate after an FSH regimen (16.1 +/- 0.8) was significantly higher than that after a single injection of PMSG (10.8 +/- 1.2). Fertilization rate and survival of embryos following transfer to naturally synchronized recipient feral goats did not differ between the two gonadotrophin regimens: the mean number of kids born to 47 donors treated with FSH (7.5 +/- 0.6) was significantly greater than that to 28 donors treated with PMSG (4.8 +/- 0.6). Irrespective of hormonal treatment, the numbers of embryos recovered and of kids born were correlated with ovulation rate (r = 0.82, P less than 0.001 for both). Embryo survival was influenced by ovulation rate in recipients, with 52%, 63% and 75% of transferred embryos being carried to term by recipients with 1,2 and 3 CL, respectively (P less than 0.01). More embryos survived (65%) when 2 embryos were transferred to each recipient than when 1 (51%) or 3 (48%) were transferred. In recipients receiv...Continue Reading

Citations

Mar 23, 2000·Theriogenology·Y Cognie
Jun 8, 2006·The Journal of Reproduction and Development·Kazuaki SasakiKazuyoshi Taya
Mar 23, 2011·Animal Reproduction Science·Francisco Carlos de SousaDárcio Ítalo Alves Teixeira
Mar 14, 2008·Theriogenology·W HoltzM-A Driancourt
Nov 18, 2015·Animal Reproduction Science·Leyan YanZhendan Shi
Dec 9, 2009·Reproduction in Domestic Animals = Zuchthygiene·F QuanY Zhang
Aug 13, 2011·Theriogenology·A N Al YacoubW Holtz
Feb 3, 2006·Tropical Animal Health and Production·A K Goel, K P Agrawal
Jul 31, 2019·Asian-Australasian Journal of Animal Sciences·Jun LuoShuang Sun
Jan 14, 2005·The Journal of Reproduction and Development·Mohamed S MedanKazuyoshi Taya

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