[The concept of prematurity; duration of pregnancy & mortality].
D005260:Female; D006801:Humans; D007226:Infant Mortality; D007231:Infant, Newborn; D007234:Infant, Premature; D011247:Pregnancy / Q000502:physiology
INFANT MORTALITY; INFANT, PREMATURE; PREGNANCY/physiology
Begreppet immaturitet; graviditetsduration och mortalitet.