Reference Range

≤ 0.10 x10^6 sperm/mL

Patients may stop using other methods of contraception when examination of 1 well-mixed postvasectomy semen specimen shows azoospermia or rare nonmotile sperm (RNMS) (≤ 100,000 nonmotile sperm/mL), which is equivalent to ≤ 0.10 x10^6 sperm/mL. The risk of pregnancy after vasectomy is approximately 1 in 2000 for men who have postvasectomy azoospermia or postvasectomy semen analysis (PVSA) showing RNMS. If >100,000 nonmotile sperm/mL persist beyond 6 months after vasectomy, then trends of serial PVSAs and clinical judgment should be used to decide whether the vasectomy is a failure and whether repeat vasectomy should be considered. Vasectomy should be considered a failure if any motile sperm are seen on PVSA at 6 months after vasectomy, in which case repeat vasectomy should be considered.