When Does 3rd Trimester Begin

2 Replies
jenice - November 2

I'm 24 weeks, and this whole system of having a 40 week period divided into trimesters is confusing. Anyone know the official week we switch to third trimester? (I've been guessing 26 or 27, but I'd like to know for "sure".) You know, if it was easier to keep track of, we could have parties each time (like birthday parties....but with really good food!).

 

princesa - November 2

From how I understand it-each trimester is 13.3 weeks long, which would make the 3rd trimester start at 26.6 weeks-or right between your 26th and 27th weeks.

 

cayingo - November 2

I like the idea of trimester parties. Good food would be essential! I thin kfor convenience sake OBs say when you start your 26th week you're starting your 3rd tri. At least that's what I've read. You don;t have far to go. Congrat!!!

 

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