trimester

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Some women experience morning sickness during the first trimester of pregnancy.
有些婦女在懷孕的頭三個月里，早上有惡心感。
Case Study: A woman in the first trimester of a pregnancy aborted her fetus before dying from rhubarb poisoning herself.
案例：一個懷胎三個月的女人先是墮了胎，而后因?yàn)槌源簏S花葉自己也中毒身亡。
After a period of proliferation during the second trimester, neurons are also "pruned," meaning that they undergo a planned cell death.
在增殖期過后第二個三個月里，神經(jīng)元也被“削減”，這意味著它們經(jīng)歷了一個有計(jì)劃的細(xì)胞死亡過程。

And so we are proposing to give this pouch to mothers in their first or second trimester, when they come in for their first antenatal care visit.

Wade of 1973, which legalized abortion in the U.S. in every state (trimester dependent).
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In her last trimester she underwent chemotherapy and that seemed to work for a while.
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The first trimester of a pregnancy is the first three months of the pregnancy. The second trimester is the period from three months to six months, and the third trimester is the period from six months to nine months.
In colleges and universities in some countries, a trimester is one of the three main periods into which the year is divided.