title: The first trimester.
abstract: Maternal and fetal events of the first trimester are examined with emphasis on the more common physiologic changes that occur. Suggestions are given for the management of nausea, breast tenderness, frequency of urination, and fatigue. Critical components of initial prenatal care are discussed and timing of subsequent visits recommended. The most common complications of early pregnancy, spontaneous abortion, and ectopic pregnancy are reviewed.
mesh_terms: D000022:Abortion, Spontaneous / Q000175:diagnosis; D006063:Chorionic Gonadotropin / Q000502:physiology; D005260:Female; D005333:Fetus / Q000502:physiology; D005836:Genitalia, Female / Q000502:physiology; D006801:Humans; D011247:Pregnancy; D011248:Pregnancy Complications / Q000175:diagnosis*; D011258:Pregnancy Tests; D011261:Pregnancy Trimester, First; D011271:Pregnancy, Ectopic / Q000175:diagnosis; D011295:Prenatal Care
chemical_list: D006063:Chorionic Gonadotropin