Effect of ecological and socio-economic factors on the age at menarche, body height and weight of rural girls in Poland.
D000293:Adolescent; D000367:Age Factors; D001827:Body Height; D001835:Body Weight; D002675:Child, Preschool; D005260:Female; D006801:Humans; D008572:Menarche; D008598:Menstruation; D011044:Poland; D012959:Socioeconomic Factors