By the third trimester of my first pregnancy my goal was to keep my weight gain equal to my week which would have made me 27 pounds heavier at this point.

我第一次怀孕的后期，我的目标是保持我的体重增加跟怀孕的周数等同，这就是说到这个时候我已经增重了27磅。

youdao

Even during the earliest part of your pregnancy, the first trimester, you will be gaining some weight.

甚至在怀孕的最初时期，即妊娠早期，孕妇也会增加一些体重。

youdao

Case Study: a woman in the first trimester of a pregnancy aborted her fetus before dying from rhubarb poisoning herself.

案例：一个怀胎三个月的女人先是堕了胎，而后因为吃大黄花叶自己也中毒身亡。

youdao

To nab an under-2 spot at Hansen Place in Brooklyn's Fort Greene, parents need to apply when the mother is in the first trimester of pregnancy.

WSJ: It's Now a Grind For 2-Year-Olds

They also said states could regulate abortion procedures in the interest of a woman's health or in protecting a potential human life starting at the end of the pregnancy's first trimester.

CNN: Before and after Roe v. Wade

It does not bother us when they forbid their own people to eat Oscar Mayer, clerk at Saks on the Sabbath, marry people of the same gender, drink Starbucks, play cards, dance, engage in any effort to prevent conception, terminate a pregnancy within the first trimester or sew a zipper into their clothing.

FORBES: We Don't Need a Woman President