There are 3 trimesters in pregnancy...
Pregnancy is 9 months so just divide into 3.
Each trimester lasts 3 months :)
hope that helps you!
Well today is the first day of my 14th week isn't it ???
Third trimester beings at 27wks.
technically they say that if you're a FTM, your 2nd trimester doesn't begin until week 14.
The third trimester begins at week 28 :)