Reviewed by William C. Shiel Jr., MD, FACP, FACR on Thursday, September 01, 2011
Overview
Pregnancy is measured in trimesters from the first day of your last menstrual period (LMP) and normally lasts about 40 weeks from conception to the birth of a baby. This time is roughly divided into 3 periods: the first trimester, second trimester and third trimester.
For slideshow see:
http://www.medicinenet.com/stages_of_pregnancy_pictures_slideshow/article.htm
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