Intervals between multiple ovulations in PMSG-treated and untreated ewes and the relationship between ovulation and oestrus

摘要

Summary. The timing of ovulations in 42 PMSG-treated ewes was determined by repeated endoscopy. The first ovulation occurred at a median time of 23·6 ± 0·5 (s.e.m) h after the onset of oestrus. The median interval between first and second ovulations was less than 1 h, and that between first and last ovulations was approximately 6 h.