Influence of Progesterone-Treatment Length and eCG Administration on Appearance of Estrous Behavior, Ovulatory Success and Fertility in Sheep

This study examines the pre-ovulatory and ovulatory events (in terms of the timing of the onset of estrous and subsequent ovulation) and the yields obtained (in terms of ovulation rate, progesterone secretion, and fertility) after insertion of Controlled Internal Drug Release (CIDR) for five, six, seven, or fourteen days, with or without equine chorionic gonadotrophin (eCG)