Developmental defects and mortality rate of fetuses and newborns from multiple pregnancies.
D000013:Congenital Abnormalities / Q000235:genetics / Q000401:mortality*; D005260:Female; D005313:Fetal Death / Q000453:epidemiology*; D006801:Humans; D007226:Infant Mortality; D007231:Infant, Newborn; D008297:Male; D011044:Poland; D011247:Pregnancy; D011811:Quintuplets; D014310:Triplets; D014427:Twins