Does second trimester start at

Question

Just curious. Lots of websites say different things!

Answer

13.333333333333 weeks

Answer

Yep! Based on the math it’s 40/3 which is 13.3333. 
Basically there’s an extra week preventing each trimester from just being 13 weeks (39/3 is 13). So depending on the site/app they’ll give you different answers depending on where they tack on the extra week, though a lot add it to the first trimester. 
But ultimately, it’s doesn’t really matter 🤷🏼‍♀️

Answer

The 13th week. So technically after you’ve officially gone through 12 weeks, you’re entering into the second trimester. Depends on how you word it...

Does second trimester start at

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