MedlinePlus Medical Encyclopedia: Early weeks of pregnancy

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Early weeks of pregnancy

The first trimester of a pregnancy is a time of incredible growth and development. A 7-week fetus will have begun to develop all essential organs.

Update Date: 4/14/2004

Updated by: Dominic Marchiano, M.D., Department of Obstetrics & Gynecology, Pennsylvania Hospital, Philadelphia, PA. Review provided by VeriMed Healthcare Network.

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