when exactly does the second trimester start? im confused?

Question

i get an email of whats going on each weeks of my pregnancy. when i got the one for 13 weeks it said i was officially in my second trimester. now im looking on different websites reading about week 14 and its saying you have now entered you second trimester. so which one is it 13 weeks or 14 weeks?

Answer 1

here is a handy website chart that is sure helping me that i got off my baby boards on baby center http://baby2see.com/pregnancylength.html

Answer 2

You're already at the end of 3 months! Trimesters are usually divided like this: weeks 1-end of 12 are first trimester, 13- end of 26 is second, 27 onward is third tri. There are 10 lunar months in pgcy...10x4=40 weeks therefore 12/4=3 months

Answer 3

Eh, I say about 13 weeks in a trimester (13x3=39...close enough to 40), so you'd be in your second when you COMPLETED your 13th week. It's not an exact science though...it just gives you and other people an idea of how far along you are. The first site probably said 13 weeks began the 2nd trimester because 13 weeks IS a turning point...if you finish that 12th week, your chance of miscarriage drops dramatically.

Answer 4

Ist trimester: 1-13 weeks
2nd trimester: 13-27 weeks
3rd trimester: 27-40 weeks

Answer 5

Okay so actually the end of your first trimester would be 13 weeks. The second trimester would officially start at the begining of your 14th week.

Answer 6

Your 2nd trimester starts at 14 weeks

Answer 7

My doctor told me that the last day of your 13th week is the end of your first trimester, and the first day of your 14th week is the first of your second trimester...