When does the third trimester start? I have two different apps saying two different things

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40 / 3 = 13.333 
so technically it is 13.33*2=26.66

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You can go by whichever one lol but I usually go by the latest week out of all the apps. So I’ll be going by 28 weeks just because I can feel better about saying I’m in the third trimester instead of feeling like I’m still in the maybe because of all the confusion 😄🤣 but that’s just me because I’m weird like that.

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I’m going with 27 weeks because I’m due March 18 and 27 weeks exactly I would enter my 7th month of pregnancy and they always say 7th month is 3 trimester

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Im from New Zealand and we use 28 weeks. Im 27w4d nearly there

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I’m going by 27 weeks because I go onto my 27th week this Sunday so to be able to say “yay third trimester for Christmas” is fun😂

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I think it’s actually like 27weeks 5 days or something weird so you could count it for either.

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This app told me welcome to the 3rd trimester at 26 weeks so Idk lol I thought it was 28 weeks

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At my OB it’s 28 weeks so that’s just what I went by🤷🏻‍♀️

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Technically it’s 26 weeks 5 days (that is about two thirds of the way through 40 weeks of pregnancy). 26 weeks pregnant means you’re in your 27th week and 27 weeks pregnant means you’re in your 28th week. That’s where the confusion comes from. Safe to say that you’re in the third trimester when you hit 27 weeks pregnant and start your 28th week.

When does the third trimester start? I have two different apps saying two different things

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