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Vanishing twins: the frequency of spontaneous fetal reduction of a twin pregnancy
Author(s) -
Sampson A.,
de Crespigny L. Ch.
Publication year - 1992
Publication title -
ultrasound in obstetrics and gynecology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.202
H-Index - 141
eISSN - 1469-0705
pISSN - 0960-7692
DOI - 10.1046/j.1469-0705.1992.02020107.x
Subject(s) - medicine , obstetrics , gestation , twin pregnancy , fetus , abortion , in vitro fertilisation , pregnancy , in utero , gynecology , obstetrics and gynaecology , embryo transfer , live birth , genetics , biology
This study examines the outcome of 126 twin pregnancies diagnosed by ultrasound examination at 6–16 weeks' gestation. Fifty‐nine patients conceived by in vitro fertilization (IVF) and embryo transfer and had a routine scan. The 67 non‐IVF pregnancies had a scan for other clinical indications including threatened abortion. When live twins were detected prior to 7 weeks'gestation, only 71% of pregnancies resulted in live twin neonates. Each fetus of a multiple pregnancy had a 19% chance of dying in utero or in the neonatal period of diagnosed prior to 7 weeks, and 11% if both were found to be alive between 7 and 10 weeks. The fetal loss rate was similar for IVF and non‐IVF pregnancies. Copyright © 1992 International Society of Ultrasound in Obstetrics and Gynecology