title: Evaluation of the morphology of sperm in urine of adolescent boys.
abstract: The morphology of spermatozoa in the first morning void of boys aged 12-16 years was evaluated. The results suggest that the number of cells having normal morphology increases with advancing age. Thus, the percentage of boys with greater than 45% normal sperm was 26% at the age of 12-13, increasing to 51% at the age of 15-16.
mesh_terms: D000293:Adolescent; D000375:Aging; D002648:Child; D006801:Humans; D008297:Male; D012741:Sexual Maturation; D013094:Spermatozoa / Q000002:abnormalities / Q000166:cytology*; D014556:Urine / Q000166:cytology*