自然发情的母羊应该在发情后24小时，诱导发情的母羊应该在撤栓后54小时，同期发情母羊应该在撤栓后60小时进行子宫内输精。

• Intrauterine insemination time are different. Ewe of naturally cycling is inseminated after 24 hours of oestrus; Ewe of Estrus Induction is after 54 hours of device removal;