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Normal Pregnancy: First Trimester


Picture of fetal development in the first trimester

The first trimester lasts from week 1 through week 12.

ByHealthwise Staff
Primary Medical ReviewerSarah Marshall, MD - Family Medicine
Specialist Medical ReviewerKirtly Jones, MD, MD - Obstetrics and Gynecology
Last RevisedNovember 10, 2010

eMedicineHealth Medical Reference from Healthwise

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