英语语法分析

Physiological functions of testosterone, estrogen and progestogen.

睾酮、雌激素及孕激素的生理作用。

Analyses were stratified according to estrogen dose and progestogen type.

又根据雌激素剂量和孕激素类型对分析进行了分层。

Objective: to study the effect of estrogen and progestogen on the development and implantation of mouse embryos in vitro.

目的：研究雌、孕激素在小鼠胚卵体外发育及胚泡着床过程中的作用。