Can someone tell me how long each trimester is of pregnancy? I just started OB in school and they talk about trimesters but I can't find it in my notes or my book how long each one is. I've never had kids myself so I really don't know.
Dec 13, '06
Trimesters are generally 3 months, hence the name "trimester". However, the normal term pregnancy lasts roughly 40 weeks, therefore, really, it's a 10 month gestation we are talking about. It's of much more value when assessing pregnancy stages/development to discuss weeks' gestation, rather than trimesters or months.
1st trimester, conception through week 12
2nd trimester week 13 through week 27
3rd trimester, week 28 until delivery
but, again, the term pregnancy is really 10 lunar months.
Hope this helps?
Last edit by SmilingBluEyes on Dec 13, '06