trimesters.....?
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trimesters.....?
| Thu, 03-22-2007 - 12:11pm |
Hey:
I know I should remember this, but I just do not. I am almost 13 weeks now. I was wondering, when does the firt trimester end? What is the breakdown of weeks for trimesters?
Thanks!
( you are all such wonderful people.... I enjoy being here.)
Scarlett
Edited 3/22/2007 12:21 pm ET by srobinson2006

Here ya go:
By definition, the word ‘trimester’ divides a time into three equal parts. However, pregnancy is not neatly divisible by three. If you calculate from the last menstrual period (LMP) with a 28-day cycle, a pregnancy lasts 40 weeks or 10 lunar months. If you calculate from probable conception, again based on a 28-day cycle, you are left with a gestational period of 38 weeks. Neither of these is divisible by three. As a result, you get somewhere in between 12 2/3 weeks and 13 1/3 weeks. Conventionally, it is common to say that the first trimester ends at 12 weeks (12 weeks from the first day of the last period). The second trimester proceeds from 12 to 28 weeks and the third trimester extends from 28 to 40 weeks.
Welcome to the 2T Scarlett!!!
Tara:
Thanks! I knew I must be getting close, but I couldn't remember and can't find it in any of my books.... a sigh of relief.... you are great!
Scarlett
Hey, Scarlett! Come down and join us in 2T! I'll see you there! We made it!
Tami