A 32-year-old man underwent no-scalpel vasectomy 6 weeks ago and has had about 10 ejaculations. He asks when he can stop using backup contraception. What should he be told?
- A Only after semen analysis confirms azoospermia, usually around 12 weeks or about 20 ejaculations ✓
- B After 6 weeks, regardless of semen findings
- C Immediately, since the vasa were occluded during surgery
- D After his next semen analysis shows reduced sperm motility
Correct answer: A. Only after semen analysis confirms azoospermia, usually around 12 weeks or about 20 ejaculations
Explanation
Sperm already present distal to the ligature can cause pregnancy for weeks after vasectomy, so another contraceptive method is mandatory until semen analysis shows complete azoospermia, conventionally checked at about 12 weeks or after roughly 20 ejaculations. Clearing at 6 weeks or on motility alone is not accepted. Immediate protection is wrong because recanalization and residual sperm make early failure possible.
Reference: Park's Textbook of Preventive and Social Medicine, 27th ed.
High-yield for: NEET PGINI-CETNExTFMGEUSMLEPLABMRCP
Written and medically reviewed by the StethoPrep medical team.