Xihe Li,Wenzhong Zhou,Guofu Zhang,Songjin Qian,Jiangguo Wang
申请号：
US12321704
公开号：
US08251887B2
申请日:
2009.01.24
申请国别(地区):
US
年份:
2012
代理人:
摘要：
Artificial insemination of female animals and in vitro fertilization of oocytes with fresh or frozen-thawed semen have been applied to the reproduction of animals. According to the traditional theory and conventional procedures, a great number of sperm cells are needed to ensure a successful fertilization.
