When Does The Secong Trimester Begin

4 Replies
momma3tobe - February 1

I always thought 12 weeks marked the beginning of the secong trimester and the extra 2 weeks are actually tacked on to the beginning of the pregnancy (you are already 2 weeks pregnant when you concieve) but now I am hearing 13/14 weeks begin the 2nd trimester and that pregnancy is three 13 week trimesters....I am confused now...when I pregnant w/ my 1st and 2nd it was 1-12 was first trimester and the 2nd was 12 -24 and the third was 24-40?

 

Tracy88 - February 1

Weeks 1 to 12 are the the first trimester and the beginning of week 13 marks the third trimester. This is going by everything I have read and experienced thus far. I am now 24 weeks.

 

jessica72 - February 1

I have also heard the second tri starts at 13 weeks and that the third trimester starts at 28 weeks. Every literature is slightly off, but that seems to be the consensus.

 

Faye84 - February 1

second triemester is at 13 weeks. but remember it can always be off 0-2 weeks.

 

Tracy88 - February 1

Oopsie....I meant to write that the beginning of week 13 marks the beginning of the "second" trimester, not the third!!!

 

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