Intrauterine insemination enhances fertility of frozen semen in superovulated ewes.
Superovulated ewes were inseminated with fresh or frozen semen in a factorial experiment which compared two techniques of artificial insemination; i.e. conventional cervical deposition and intrauterine deposition at laparoscopy. Similar fertilization rates resulted from insemination with fresh semen at cervical (81% of ova from 11/11 ewes) and intrauterine (83% of ova from 10/12 ewes) sites. These results approached those observed in a naturally-mated group (95% of ova from 5/5 ewes). In ewes inseminated with frozen semen, fertilization rate was markedly reduced (P less than 0.05) after cervical insemination (11% of ova from 3/11 ewes) and partly restored (P less than 0.05) after intrauterine insemination (50% of ova from 8/11 ewes).
D000818:Animals; D002584:Cervix Uteri; D005260:Female; D005298:Fertility; D007315:Insemination, Artificial / Q000379:methods*; D010535:Laparoscopy; D010060:Ovulation; D012662:Semen Preservation; D012756:Sheep; D013480:Superovulation; D014599:Uterus