The upmost insemination pregnancy rate of frozen semen for the ewe of naturally oestrus is 57.14%(4/7), the ewe of estrus induction is 62.50%(20/32), the ewe of estrus synchronization is 55.56% (5/9) .

• 本试验自然发情母羊子宫内冻精输精受胎率为57.；14%25(4/7)，诱导发情母羊子宫内冻精输精受胎率为62