Modifications in the sexual development and in the physical aspect of the population of the People's Republic of Bulgaria in the last decades.
D000293:Adolescent; D000328:Adult; D000368:Aged; D002031:Bulgaria; D002648:Child; D002675:Child, Preschool; D005260:Female; D006128:Growth; D006801:Humans; D008136:Longevity; D008297:Male; D008598:Menstruation; D008875:Middle Aged; D012924:Social Conditions