The effect in the second trimester of pregnancy was most marked.

在怀孕的第4-6个月时影响最为显著。

youdao

Weight gain during the second and third trimesters of pregnancy is going to be more steady after the first trimester.

在怀孕的第二第三阶段，体重增加相对最初阶段变得稳定。

youdao

During the second trimester of pregnancy, you will gain around 1 to 2 pounds per week.

在怀孕第二阶段，每周你会重个1到2磅。

youdao

To get human retinal cells at the same stage of development, however, would involve taking stem cells from a foetus during the second trimester of pregnancy.

BBC: NEWS | Health | Cell transplants 'restore sight'

Some states have no time limit, while others allow abortion up to the end of the second trimester, about 27 or 28 weeks into the pregnancy.

CNN: North Dakota governor signs law banning most abortions