title: [Study on the sexual development of adolescent male].
abstract: OBJECTIVE
  The investigation of the testicular volume, the penis length and the T, FSH, LH, PRL levels in serum were taken in 289 adolescent males to provide the valuable data for andrology.
  
  
  METHODS
  The adolescent males were grouped according to their age. The testicular volume was measured with testicular model and the T, FSH, LH, PRL levels in serum were determined by immunoenzymetric assay.
  
  
  RESULTS
  The male sexual development was rapid from age 11 to 16 and close to that of adult at age 18. Serum PRL of adolescent males was higher than that of adult males.
  
  
  CONCLUSIONS
  The age 11 to 16 is a period of rapid growth in sexual maturation. PRL may play an important role in sexual maturation.
authors.affiliation: Institute for Family Planning of Shangdong Province, Jinan, Shandong 250002, China.
authors.forename: Ling
authors.initials: L
authors.lastname: Gai
authors.forename: Dan-Tong
authors.initials: DT
authors.lastname: Yang
authors.forename: Hui-Qing
authors.initials: HQ
authors.lastname: Sun
authors.forename: Guan-Zhao
authors.initials: GZ
authors.lastname: Xu
authors.forename: Yi
authors.initials: Y
authors.lastname: Qiu
authors.forename: Li-Feng
authors.initials: LF
authors.lastname: Zhang
authors.forename: Zheng-Da
authors.initials: ZD
authors.lastname: Ren
mesh_terms: D000293:Adolescent; D001827:Body Height; D001835:Body Weight; D012739:Gonadal Steroid Hormones / Q000097:blood*; D006801:Humans; D008297:Male; D010413:Penis / Q000502:physiology*; D013737:Testis / Q000502:physiology*
chemical_list: D012739:Gonadal Steroid Hormones