Abstract
On the basis of biannual examinations of 40 normal boys followed longitudinally for a period of up to 7 years (initially aged 8-11), the following maturity measures were studied: first occurrence of a testis size of more than 4 ml., pubic hair stage greater than Tanner stage one, broken voice, axillary hair greater than stage one, beard growth, occurrence of acne and the age of maximal height growth velocity and spermarche (onset of the release of spermatozoa).Spermarche was estimated on the basis of occurrence of spermatozoa in quarterly collected 24-h urine samples, using the information of first occurrence of spermaturia and the frequency of intermittent occurrence of spermaturia after the first.With confidence limits of about ± 4 months, the maturity measures showed the following time lags. Prior to spermarche: testis size >4 ml (16 months), pubic hair stage>1 (10½ months), first occurrence of broken voice (½ month). After spermarche: max. height growth velocity (5½ months), axillary hair stage>1 (8 months), growth of beard (12 months) and occurence of acne (13 months).
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
