Male hormonal contraception via gonadotropin and intratesticular androgen withdrawal disrupts spermatogenesis at two principal sites: 1) spermatogonial maturation, and 2) spermiation.
Prince Henry's Institute, and Departments of Obstetrics and Gynaecology, Monash University, P.O. Box 5152, Monash Medical Center, Clayton, Victoria 3168, Australia. kati.matthiesson@princehenrys.org