Seasonal differences in pregnancy outcomes: United States, 1971-1989.
Stupp
P W
PW
Division of Reproductive Health, Centers for Disease Control and Prevention, Atlanta, Georgia 30341-3724.
Warren
C W
CW
D005260:Female; D006801:Humans; D007231:Infant, Newborn; D010507:Periodicity; D011247:Pregnancy / Q000208:ethnology / Q000706:statistics & numerical data*; D011256:Pregnancy Outcome / Q000453:epidemiology*; D012621:Seasons; D014481:United States / Q000453:epidemiology