The experiment result showed that there were different influences of the superovlation in different stage of Estrous cycle,and there were the best results in proestrus group and dioescrus group,with the best quality of embryo.

Study on changes of productive hormones of Small Meishan pig during estrous cycle;

Observation on histological structure of corpus luteumin in the yak during estrous cycle;

Histological observations of follicular development in ovaries of yaks during estrous cycle;

Research of Rabbit s uterus tissue texture of different periods of oestrus cycle;

The secretory characteristics of GTH and sexual hormone of Jining gray goat during the oestrus cycle;

To study on the validity of vaginal cytology to determine oestrus cycle,seven bitches ovariohysterectomized 45 days before were treated with intermuscular injection of estradiol benzoate and progesterone to simulate the patterns of estrogen and progesterone in bitches\' oestrus cycle.

Observation of Result of Synchronous estrus Inducedby Medicament and Artificial Insemination in Goat;

The local yellow cattle groups of CK,free supplementary feeding by farmers and supplementary feeding with mixed feed were injected by PG for one and two times to investigate the effect on synchronous estrus after the tested cattle were fed for three months.

Accorded the method of Synchronous estrus and superovulation was applied to 35 Green goats.