Second trimester starts when?

[blushing]

I keep reading conflicting info on when the second trimester starts. Some places/books say 13 weeks and some say 14 weeks (Babycentre). What is your opinion?

[VillainV]

I'm pretty sure it's the "14th week" which is technically 13w0d (the first week is 0w0d).

[rbp]

I went with 14 weeks. My thinking is that you don't actually get pregnant until 2 weeks.

So when does third tri start? 27 weeks?

[mrssandro]

I always thought it was 13 wk + 1 day. But this could be because I am super anxious to be out of the first tri.

[smock]

My doctor's office says second tri starts at 13 weeks; third tri starts at 27 weeks.

[blushing]

Ok, in that case, I am in the second trimester <)

[melsamoony]

blushing I agree with everyone else about second tri starting at 13 weeks. YAY and congratulations for entering your 2nd trimester. I hope it treats you well.

[purrbox]

My doc said 14 weeks.

[mrspost08]

Yay blushing!!!!

[pinotgrig]

40 weeks divided by three trimesters is 13.33 weeks each. So:
1st tri - 0 to 13 weeks
2nd tri - 14 to 26 weeks
3rd tri - 27 to 40 weeks

Congrats on being in 2nd tri!

[Odonata]

Yay congrats! I'm counting down the weeks myself!

[jewel]

I say 1/3 of 40, so 13 weeks, 2.33 days

[Blue Moon]

13 w 3 d if we're being technical

[robinsbff]

Mar 19, 2014 11:11:42 GMT -5 Blue Moon said:

13 w 3 d if we're being technical

this is what i went with.  not that a day or two either way really matters in the big picture.  then i'm going with 26+6 for third tri.