title: Spontaneous superfetation diagnosed in the first trimester with successful outcome.
abstract: We report a twin pregnancy in which a 4-week discordance in size between the fetuses was identified in the first trimester. The discordance was maintained throughout the pregnancy, which was otherwise uneventful and resulted in the delivery of a live girl and boy.
authors.affiliation: Department of Radiology, Leicester Royal Infirmary, UK.
authors.forename: G D
authors.initials: GD
authors.lastname: Tuppen
authors.forename: C
authors.initials: C
authors.lastname: Fairs
authors.forename: R C
authors.initials: RC
authors.lastname: de Chazal
authors.forename: J C
authors.initials: JC
authors.lastname: Konje
mesh_terms: D005260:Female; D006801:Humans; D007231:Infant, Newborn; D008297:Male; D011247:Pregnancy; D011256:Pregnancy Outcome; D011261:Pregnancy Trimester, First; D013476:Superfetation; D016216:Ultrasonography, Prenatal