Mono-amniotic twins.
D000328:Adult; D001724:Birth Weight; D000013:Congenital Abnormalities; D005260:Female; D006801:Humans; D007226:Infant Mortality; D007231:Infant, Newborn; D007743:Labor, Obstetric; D008297:Male; D008431:Maternal-Fetal Exchange; D010920:Placenta / Q000033:anatomy & histology; D011247:Pregnancy; D011272:Pregnancy, Multiple; D014427:Twins