Anti-Müllerian hormone plasma concentration in prepubertal ewe lambs as a predictor of their fertility at a young age

Plasma was taken from 76 Rasa Aragonesa ewe lambs at 3.6 months of age for AMH determination. Simultaneously, 600 IU equine chorionic gonadotropin (eCG) was administered and the number of ovulations recorded 6 days later. AMH was detected in 93% of the lambs, and the concentrations were about 3-4-fold higher in ovulating than in non-ovulating lambs (P = 97 pg/mL than in those with lower AMH concentrations (50% vs. 15%; P < 0.001)