Seasonal changes in the frequency of fetal damages and fertility.
D000022:Abortion, Spontaneous / Q000453:epidemiology*; D001723:Birth Rate; D005260:Female; D005298:Fertility; D005313:Fetal Death / Q000453:epidemiology*; D006801:Humans; D006814:Hungary; D010507:Periodicity; D011247:Pregnancy; D012621:Seasons; D014798:Vital Statistics