英语语法分析

Oestrogen helps to keep open the artery carrying oxygen-rich blood to the foetus.

雌激素可使动脉血管扩张，含氧量高的血液得以流向胎儿。

Perhaps we are really talking about amniotic fluid, which surrounds the foetus in the birth sac.

也许我们真正在谈论的是羊水，也就是包围着胎儿的那些液体。

In this chapter we will look at what happens when a human foetus receives too much or too little male hormone.

在这一章里，我们将看看当一个人类胎儿接收了过多或过少的雄性激素会发生什么。