Lunar and seasonal variations in obstetric factors.
D000293:Adolescent; D000328:Adult; D001741:Black or African American; D001724:Birth Weight; D005260:Female; D006801:Humans; D007231:Infant, Newborn; D007234:Infant, Premature; D008297:Male; D010507:Periodicity; D011247:Pregnancy; D011248:Pregnancy Complications; D012621:Seasons; D014798:Vital Statistics