Seasonal variation in conception and various pregnancy outcomes.
D000028:Abortion, Induced; D000022:Abortion, Spontaneous / Q000453:epidemiology*; D005260:Female; D005306:Fertilization; D006801:Humans; D011247:Pregnancy; D011271:Pregnancy, Ectopic / Q000453:epidemiology*; D012621:Seasons; D014481:United States