Does anyone have the answer?

OK, question everyone.

When does the 2nd trimester officially begin?  I know, I know, I am a nurse, I should know these things, but dag on it, I am confused.  Too much information, too many websites, too many books.

Does it start at

A)12 weeks

B)13 weeks

C) 14 weeks

Somebody.  Anybody.  Put me out of my misery.

5 Comments

  1. Congrats on almost making it through the first trimester! How exciting!

    I wish I had an answer, but I am still really early. (About 4.5 weeks) I have a hard time thinking about the first trimester, much less the second trimester!

  2. 12 weeks. Each trimester last 12ish weeks/3 months. Trimester is left over from when they still thought pg lasted 9 months. They LIE!!! ALL LIES!!!

  3. My view was 14 weeks, being conservative. Mathematically, I would say it is 13 and 1/3 weeks, which is 40 weeks divided by 3. I just rounded that up to 14. But 13 is probably close enough-

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