Maternal serum alpha-fetoprotein, birthweight and perinatal death in twin pregnancy.
D001724:Birth Weight; D005260:Female; D005865:Gestational Age; D006801:Humans; D007226:Infant Mortality; D011247:Pregnancy; D011272:Pregnancy, Multiple; D014427:Twins; D000509:alpha-Fetoproteins / Q000032:analysis*
D000509:alpha-Fetoproteins