Uterine Bleeding in the Second Trimester Caused by Abnormal Placental Development

Abstract

Uterine bleeding in the second trimester may result from abnormalities that are not specific to this period of gestation, but certain abnormal placental developments are more prone to produce symptoms between the twelfth and twenty-eighth weeks than at other times. The three such conditions discussed are circumvallate placenta, hydatidiform mole and choriocarcinoma.