When does third trimester start?

I keep seeing different answers
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28 weeks

28 weeks

I've heard 28 weeks as well!

This never made any sense to me 😭 I feel like the second trimester should start when you turn 13 weeks, and the third should start when you turn 26 or 27 weeks. That makes the most sense to me 😅

@Becca the second trimester seems like such a long time like I'm still in second? Been like 10 weeks since I made it to 2nd and I still got 4 weeks to go?!

@Lyrica Once I hit 26-27 weeks I'm just going to say I'm in the third trimester 🤣 That's 6 months pregnant anyway!

It's 28 weeks.. not every month is exactly 4 weeks. That's why we don't count by months for progress and development

@Becca it really doesn't matter what we think it should be mathematically? it's not an opinion. it's what medical professionals follow for fetal development. If you want to say you're in the 3rd trimester at 26 weeks, cool. doesn't make it true haha

@Becca please provide a reputable, medical, source that says the same thing. 🙃

@Becca that doesn't say 3rd trimester begins at 26 weeks.. you also didn't ask for a source. so your passive aggressive "but haven't" is also comical. but here yah go! ❤️ https://www.upmc.com/services/womens-health/services/obgyn/obstetrics/pregnancy/journey/third-trimester https://www.nhs.uk/start-for-life/pregnancy/week-by-week-guide-to-pregnancy/3rd-trimester/week-28/ https://my.clevelandclinic.org/health/articles/third-trimester https://www.acog.org/womens-health/faqs/how-your-fetus-grows-during-pregnancy#:~:text=Third%20trimester%20(28%20weeks%20and,ready%20to%20function%20after%20birth. https://www.nichd.nih.gov/health/topics/factsheets/pregnancy https://www.nichd.nih.gov/health/topics/pregnancy/conditioninfo https://maternity.jacksonhealth.org/pregnancy-milestones/first-second-third-trimester/#:~:text=The%20third%20trimester%20is%20considered,%2Dterm%20(past%20due). https://www.tommys.org/pregnancy-information/im-pregnant/pregnancy-calendar/third-trimester-weeks-29-40

I really don't go by Right now Weeks or trimester I go with what I have left of my pregnancy on my scheduled C-section March 24th i will be 37weeks And 1day at the scheduled so we have 13weeks and 2days left 🥰🥲 It seems like it goes faster that way

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