Abstract
The present experiment was desighed to examine the effects of LH-RH analogueon the ovarian response and the number of embryos recovered in Japanese Black Cows superovulated with PMSG and PGF2α.
The injection of LH-RH analogue was given 3-4 hours after initiation ofstanding heat. Embryos were recovered non-surgically from uterus seven daysafter estrus.
A single injection of 400 μg of LH-RH analogue was increased the number oftransferable embryos significantly and the percentage of embryos classified asexcellent and good morphorogically.
A single injection or double injections of 200 μg of LH-RH analogue was notincreased the number of transferable embryos. The double injections of 200 μg of LH-RH analogue was decreased the percentage of excellent and good embryos.
The administration of 200 μg, 400 μg or the double injections of 200 μg of LH-RH analogue was increased the percentage of morula and blastocysts.
