George F W, Wilson J D
Science. 1978 Jan 13;199(4325):200-1. doi: 10.1126/science.579477.
Androgen formation (3beta-hydroxysteroid dehydrogenase activity) was detectable in the rabbit blastocyst on day 5 of gestation (before implantation); estrogen formation was first detectable on day 7. The capacity to form estrogen on the day of implantation suggests that estrogen formation in the blastocyst may play a role in the implantation process.
在妊娠第5天（着床前）的兔胚泡中可检测到雄激素生成（3β-羟类固醇脱氢酶活性）；雌激素生成最早在第7天可检测到。着床当天形成雌激素的能力表明胚泡中雌激素的生成可能在着床过程中起作用。
