Figure 1.

Effect of the antiprogestin RU486 upon ovulation rate in PMSG-hCG-primed immature rats. Twenty-three-day-old female rats were primed with 10 IU of PMSG and 48 h later ovulation was induced with hCG (10 IU). Either vehicle or RU486 (10 mg/kg) was administered 30 minutes prior to hCG. n = 6 rats per group. ^** p < 0.03 vs. vehicle.