The precursor brains, on the other hand, transform into female or male during the second trimester of pregnancy.

另一方面，作为初期形成的大脑，在怀孕中期会形成女性的或男性的。

It turns out that the precursor genitals transform into either female or male during the first trimester of pregnancy.

结果表明，在怀孕的头三个月中，新生的生殖器官会转变为女性或男性。

Like several of her friends and the Yahoo board, I knew that she was heading into her third trimester of pregnancy.

她的朋友，雅虎的董事会，还有我都知道她已经进入怀孕的最后阶段。

They were vomiting, they were throwing up, they were nauseous, something which is relatively common especially in the first trimester of pregnancy.

她们都有呕吐恶心的症状，这其实挺常见的，尤其是在怀孕初期的三个月。

Taken together at any  point in the first trimester of pregnancy, they can induce an abortion.

在怀孕前三个月的任何时候，将它们放在一起都可能导致流产。

In the first trimester of pregnancy, she had visited the antenatal clinic of the hospital in Mumbai where I was doing residency.

在怀孕的前三个月，她去了我住院的孟买医院的产前门诊。

In one experiment, a group of pregnant women was asked to drink a lot of carrot juice during their third trimester of pregnancy, while another group of pregnant women drank only water.

在一个实验中，一组孕妇被要求在晚期妊娠中喝下许多胡萝卜汁，而另一组孕妇则只饮水。