7Driancourt M A.Follicular dynamics in sheep and cattle[J].Theriogenology,1991,35(1):55-79.
8Chemineau P,Gauthier D,Poirier J C,et al.Plasma levels of LH,FSH,prolactin,oestradiol-17βand progesterone during natural and induced oestrus in the dairy goat[J].Theriogenology,1982,17(3):313-323.
9Billings H J,ViguieéC,Karsch F J,et al.Temporal requirements of thyroid hormones for seasonal changes in LH secretion[J].Endocrinology,2002,143(7):2618-2625.
10Baird D T,Mcneilly A S.Gonadotrophic control of follicular development and function during the oestrous cycle of the ewe[J].J Reprod Fertil,1981,30:119-133.