How to count trimester in pregnancy?
Trimester means ‘three months’. A pregnancy is divided into three parts, each lasting three months roughly – thus nine months in total. In other words, a pregnancy lasts for about 40 weeks or 280 days approximately. But women will experience pregnancies of varying lengths.
There are 13 or 14 weeks in a trimester. The breakdown is not perfect as 40 weeks divided by 3 trimesters does not give us a whole number!
The trimesters, months and weeks are divided as shown below:
