Season of birth and relative body weight.
D000293:Adolescent; D000328:Adult; D000367:Age Factors; D000368:Aged; D001835:Body Weight; D002648:Child; D002675:Child, Preschool; D005260:Female; D006801:Humans; D008875:Middle Aged; D009765:Obesity / Q000209:etiology; D011247:Pregnancy; D012621:Seasons; D013851:Thinness; D013997:Time Factors