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

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

Results: The neuronal migration process was revealed on MR imaging during the second trimester of pregnancy.

结果：MR成像在中期妊娠阶段能够显示神经元移行过程。

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