Embryo transfers in Angora and Saanen goats.
16 Angora ♀♀, aged 2-8 yr, were synchronized by progesterone and superovulated with either PMSG or FSH in 1982, and 6 synchronized Angoras and 7 Saanens were superovulated with FSH in 1983. All donors were mated, and were subjected to egg recovery by uterine flushing about 5 days after oestrus. The mean ovulation rate and number of transferable embryos recovered from Angoras treated with PMSG in 1982 was 9.1 and 5.1 resp., and for FSH-treated donors they were 15.1 and 11.0. Corresponding results for Angoras treated in 1983 were 5.3 and 5.0, and for Saanans were 29.3 and 25.3. Each year, recipient feral and Angora ♀♀ were synchronized, and 329 embryos were transferred surgically to 151 recipients. 116 (77%) of the recipients kidded, producing 191 kids (58% embryo survival). Well-fed Angora and Saanen donors superovulated with FSH produced 8 and 17 offspring resp. in the year of surgery. This rate of reproduction is about 8 times greater than without superovulation, and about double that achieved when donors are superovulated with PMSG.