The first trimester of pregnancy is the first three months after
conception. Signs of early pregnancy are missed menstrual periods,
fatigue, breast enlargement, abdominal distention, and nausea.
During this period of time all organ development takes place so the
fetus is most susceptible to damage from toxins, drugs, and
infections.
Review Date: 09/02/2009
Reviewed By: Linda J. Vorvick, MD, Medical Director, MEDEX Northwest Division of
Physician Assistant Studies, University of Washington, School of
Medicine; Susan Storck, MD, FACOG, Chief, Eastside Department of
Obstetrics and Gynecology, Group Health Cooperative of Puget Sound,
Redmond, Washington; Clinical Teaching Faculty, Department of
Obstetrics and Gynecology, University of Washington School of
Medicine. Also reviewed by David Zieve, MD, MHA, Medical Director,
A.D.A.M., Inc.
A.D.A.M., Inc. is accredited by URAC, also known as the American Accreditation HealthCare Commission (www.urac.org)
