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7249862 tn?1392252689

trimesters?

So obviously I know there are 3 trimesters but when do the semesters change? Like what week does it change from second to third trimester?
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6710217 tn?1386110892
You can Google trimesters and they have calendars that show you how the trimesters are divided. That's what I did and I saved it into my gallery that way I could always go back and see what month I was in :)
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Avatar universal
1-12 weeks is first,  13-28 is 2nd and 29-40 is 3rd.
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