Onset of the release of spermatozoa (spermarche
) in boys in relation to age, testicular growth, pubic hair, and height.
Additionally, although the onset of spermatogenesis (spermarche
) was not a focus of this analysis, spermarche
closely reflects the achievement of testis function during male puberty (Kulin et al.
(4) At puberty, Baushi (Zaire) boys use numerous plants to prepare their genitals to ensure glandular function and erectile potency, to provoke spermarche
, and to effect penile enlargement.
(25) "Between the mid-19th and the mid-20th century, the average menarcheal age decreased remarkably from 17 to under 14 y[ears] in [the] United States...." (26) Boys begin pubertal development around 11.5 years, (27) with "[s]perm production coincid[ing] with testicular and penile growth, generally occurring at age of 13.5-14 years." (28) Sometime during puberty, perhaps one to three years after spermarche
, the first appearance of sperm, the typical boy becomes reproductively capable.
The experience of spermarche
(the age of onset of sperm emission) among selected adolescent boys in Nigeria.
Young men have seen the same decline in spermarche
(when they first produce viable sperm) (Atwater, 1992).
The evaluation of sperm in urine (spermaturia) has been used previously to assess the age of onset of spermarche
. Spermatogenesis can begin before any other signs of puberty (Nysom et al.