OVARIAN RESPONSE TO HUMAN CHORIONIC GONADOTROPHIN AND EGG TRANSPORT IN THE PREGNANT AND POST-PARTURIENT RABBIT

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Abstract
SUMMARY: Ovarian response (number of ovulations) to a single dose of 25 i.u. human chorionic gonadotrophin (HCG) given intravenously on the 5, 9, 12, 17, 21, 25 or 28th day of pregnancy or within 24 hr. post partum was examined in 67 does. HCG given post partum or early in pregnancy resulted in a normal number of ovulations but from mid-pregnancy to near term superovulation occurred in 50% or more of the does. Only one doe failed to ovulate. In similar, untreated does the mean number of Graafian follicles increased from 14 (6–23) on days 8–11 to 30 (9–52) on the 28th day of pregnancy. Egg transport through the tubes was significantly accelerated following ovulation induced during pregnancy.