When does 2nd trimester start?

Question

It seems like the internet is giving me different answers! Is it at 13 weeks or 14?

Answer

It’s because there’s no set time for when the trimesters begin. It’s really just off popular vote. I characterize it at when you become 13 weeks pregnant, because it’s the closest answer to 40 weeks divided by 3 lol.

Answer

My Drs office marks my 2nd trimester start date as the date I reach 12 weeks on this app (13 weeks completed).

Answer

My doctors office said that it’s the 13 1/2 week mark.

Answer

https://www.youtube.com/watch?v=UVyjWD4aeyg&feature;=share 
Watch this video she does the math on it 40 divided by 3(trimesters)  = 13 and 1/3 weeks is 2 and 1/3 day, so 13 weeks 2 days and eight hours is when your officially in your second trimester lol.

Answer

13w4d

When does 2nd trimester start?

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