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Cast Your Vote:

    • Beginning of 27th week -- Votes: 14
    • Beginning of 28th week -- Votes: 18
When does the 3rd trimester start? **POLL** penispenispenisVAGINA 4 kids; Idaho 7110 posts
18th Sep '13

Exactly like the title says. When does the 2nd trimester end and the 3rd trimester begin?

MarineWife31 Due January 25; 2 kids; 600 posts
18th Sep '13

I always thought it was when you were 28 weeks, so end of 28th week beg of 29th week..buuuut its been a while since i looked it up

tinana+2 TTC since Nov 2013; 2 kids; Staten Island, NY, United States 29606 posts
18th Sep '13

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Kyrian's Mom Due October 23 (boy); 1 child; Pensacola, Florida 742 posts
18th Sep '13

I have a due date calender on my phone called "Baby Bump" and another called "Web MD Pregnancy" .... both didn't show 3rd trimester til 28wks. So, I went by that ...

penispenispenisVAGINA 4 kids; Idaho 7110 posts
18th Sep '13

See even my mommy group on FB says it begins 26 weeks after conception, so the beginning of the 28th week