Cách sử dụng
The word 'trimester' is often used in the context of pregnancy to describe each of the three stages that a woman goes through in the nine months leading up to the birth of a baby. The first trimester is typically the first 12 weeks of pregnancy, the second trimester is weeks 13-28, and the third trimester is from week 29 until delivery. It can also be used in reference to academic calendars, where a school year is split into three semesters or trimesters.