[Survival of a newborn infant with a birth weight of 450 grams].
D001724:Birth Weight; D005260:Female; D006801:Humans; D007231:Infant, Newborn; D007234:Infant, Premature; D007752:Obstetric Labor, Premature; D011247:Pregnancy
Utrzymanie przy zyciu noworodka o ciezarze urodzeniowym 450.