title: [Investigation of reproductive organs of male children and juvenile of the Meng and the Han nationality in Chifeng area].
abstract: OBJECTIVE
  To investigate the development and the health of reproductive organs of male children and juvenile between the Meng and the Han nationality in the Meng nationality area.
  
  
  METHODS
  Male juvenile(4-18 years old) of the Meng nationality (n = 2,315) and the Han nationality (n = 2,832) were divided into four age groups. Height, weight, length and perimeter of penis, volume of left and right testis and reproductive organs illness were examined.
  
  
  RESULTS
  In 13-18 years group, the developmental speed of reproductive organs was faster in Mongolia male juvenile than that in the Han nationality (P < 0.02). After 13 years old, the developmental speed of reproductive organs of male living in town is faster than that in the country (P < 0.05). Illness of male reproductive organs was common such as hernia, varicocle etc.
  
  
  CONCLUSIONS
  There was difference of developmental status and the prevalence rate of reproductive organs of male children and juvenile between the Meng and the Han nationality.
authors.affiliation: Chifeng Service Center of Family Planning Technique of Inner Mongolia, Chifeng, Inner Mongolia 024000, China.
authors.forename: Li-Ting
authors.initials: LT
authors.lastname: Gao
authors.forename: Tian-Sheng
authors.initials: TS
authors.lastname: Zheng
authors.forename: Ming-Han
authors.initials: MH
authors.lastname: Liu
authors.forename: Zhi-Yan
authors.initials: ZY
authors.lastname: Xing
authors.forename: Hong-Jun
authors.initials: HJ
authors.lastname: Li
mesh_terms: D000293:Adolescent; D001827:Body Height; D001835:Body Weight; D002648:Child; D002675:Child, Preschool; D002681:China / Q000208:ethnology; D006801:Humans; D008297:Male; D010413:Penis / Q000502:physiology*; D013737:Testis / Q000502:physiology*