MULTIPLE PREGNANCY --SURVIVING QUADRUPLETS.
D001699:Biometry; D005260:Female; D006801:Humans; D007223:Infant; D007231:Infant, Newborn; D011247:Pregnancy; D011272:Pregnancy, Multiple; D011783:Quadruplets; D013223:Statistics as Topic; D006113:United Kingdom; D014481:United States
GREAT BRITAIN; INFANT, NEWBORN; PREGNANCY; PREGNANCY, MULTIPLE; QUADRUPLETS; STATISTICS; UNITED STATES