Female and Male Sterilisation — Eligibility, Timing, Techniques, Failure and Reversal

Sterilisation is a permanent method of contraception in which the passage of gametes is blocked surgically — the fallopian tubes in women (tubectomy / tubal occlusion) and the vas deferens in men (vasectomy). The Ministry of Health & Family Welfare (MoHFW) calls it 'the most preferred method in India', and the national programme runs it under detailed standards: Standards & Quality Assurance in Sterilization Services (November 2014), backed by Reference Manuals for female and male sterilisation and a 2016 FAQ addendum.

Exams mix two kinds of facts: programme rules (eligibility ages, timing windows, when a certificate is issued, who may operate) and surgical/clinical facts (Pomeroy vs Falope ring, site of occlusion, failure rates, ectopic risk, semen analysis, reversal). This page keeps the Indian programme numbers exactly as the MoHFW manuals state them.

Section 1.3 of the 2014 MoHFW standards lists the case-selection criteria. Information is based on the client's self-declaration, and 'no eligible client should be denied family planning services'.

1. Client should be ever married (married at least once, whatever the current marital status).
2. Women: above 22 and below 49 years.
3. Men: above 22 and below 60 years.
4. The couple should have at least one child whose age is above one year, unless sterilisation is medically indicated.
5. Neither the client nor the spouse should have been sterilised before (not applicable after a failed sterilisation).
6. The client must be of sound mind to understand the implications; a mentally challenged client needs certification by a psychiatrist and a statement from the legal guardian/spouse.

There are no absolute contraindications to tubectomy or vasectomy. Instead, the MoHFW manuals adopt the WHO Medical Eligibility Criteria for sterilisation, which sort conditions into four categories.

Why not between day 7 and 6 weeks post-partum? The 2016 FAQ explains that by the seventh day the uterus descends into the pelvis, making the tubes hard to reach, and the protective effect of endometrial shedding against bacterial colonisation wanes, so the risk of pelvic infection rises. It is safer to wait until 42 days, when the uterus has involuted and is less vascular.

General rules (MoHFW 2014): empty the bladder; identify each tube right up to the fimbria (so the round ligament is not tied by mistake); occlude within 2–3 cm of the uterine cornu in the isthmic portion — this improves the chance of reversal later; excise or occlude 1 cm of tube; avoid cautery and crushing.

Minilap tubectomy uses a small transverse or longitudinal incision. A uterine elevator helps bring the tubes into view in interval cases. The tube is excised and ligated by the modified Pomeroy technique, using a square knot with 1-0 chromic catgut. In the classic Pomeroy method a loop of mid-tube is tied at its base with absorbable suture and the knuckle above the tie is excised; as the absorbable ligature dissolves, the cut ends separate and seal by fibrosis. The FAQ adds that only chromic catgut should be used for the stumps, because other suture materials can lead to recanalisation.

Laparoscopic tubal occlusion is performed under local anaesthesia with pneumoperitoneum created by a Veress needle (or direct trocar by an experienced surgeon), preferably with CO₂. Key safety limits: Trendelenburg tilt not more than 20° (to avoid hypoventilation) and intra-abdominal pressure not above 15 mmHg. Occlusion must always use Falope (silastic) rings — one ring on each tube, and no cautery. Rings are not applied to thick, oedematous or fixed tubes; those cases need tubectomy by laparotomy under general anaesthesia.

In both techniques the mid-scrotal vas is occluded; the difference is the approach. In conventional vasectomy, one midline or two incisions (each ≤ 2 cm) are made, not more than 1 cm of vas is removed (removing more makes later recanalisation surgery harder), and the ends are ligated about 1.5 cm apart with 2-0 silk. The skin is closed with non-absorbable sutures.

No-scalpel vasectomy (NSV) reaches the vas through a single small puncture instead of a cut. MoHFW steps: bilateral perivasal block with 2% lignocaine without adrenaline; fix the vas in the midline at the junction of its upper one-third and lower two-thirds with the vas fixation (ring) forceps; puncture the skin and deliver the vas in one motion; excise about 1 cm and ligate with 2-0 black silk; deliver the opposite vas through the same puncture. Fascial interposition is optional and may reduce failure. The manual records that NSV is less invasive, causes fewer complications and takes less time than the conventional technique.

• Discharge after 30 minutes if alert, ambulatory and stable (female sterilisation: at least 4 hours).
• Scrotal support for one week; avoid heavy work for about a week.
• Sexual activity may resume when comfortable — but with condoms or another method until semen shows no sperm.

Causes of failure: pregnancy already present at surgery, wrong structure occluded (e.g. round ligament), technical error, or spontaneous recanalisation. After vasectomy, the commonest reason for 'failure' is not true failure at all — the couple stopped back-up contraception before azoospermia. In a prospective study of no-scalpel vasectomy with ligation and excision, only 60% of men were azoospermic at 12 weeks and 27.9% at 20 ejaculations, which is why a semen test, not a calendar rule, confirms success.

Ectopic pregnancy: MoHFW instructs that ectopic pregnancy must be ruled out in any pregnancy after tubectomy because sterilisation predisposes to it. In the US CREST cohort of 10,685 women, the 10-year cumulative probability of ectopic pregnancy was 7.3 per 1,000 procedures; it varied by method and age — women sterilised by bipolar coagulation before 30 had 27 times the risk of those who had post-partum partial salpingectomy. The risk did not fall in later years, so a history of tubal sterilisation never rules out ectopic pregnancy.

Female sterilisation is safe: complications occur in less than 2% of cases and serious ones are rare (MoHFW 2014).

Method-specific counselling must make sure the client understands that sterilisation is permanent; that it is surgery with a possibility of complications including failure; that it does not affect sexual function or strength; that back-up contraception is needed after vasectomy until azoospermia (usually three months); that it does not protect against STIs/HIV; that reversal involves major surgery with no guarantee; and that an indemnity mechanism exists for complications, failure or death. Informed choice (choosing among all methods) comes before informed consent (agreeing to the specific procedure).

Clients are told not to think of sterilisation as reversible. Female reversal (tuboplasty) is major surgery joining the ligated or occluded tube end to end; male reversal (vasovasostomy) is microsurgery requiring considerable skill. Neither success rate can be guaranteed, and after vasectomy reversal sperm counts and motility are usually much lower than before vasectomy. The 2016 FAQ notes that there is currently no NHM scheme under which a client can obtain recanalisation.

• Occluding the isthmus 2–3 cm from the cornu and removing only 1 cm of tube preserves length for reversal.
• Removing only ≤ 1 cm of vas keeps vasovasostomy feasible.
• If the fimbriae are cut, recanalisation is rare (2016 FAQ).
• Spontaneous recanalisation is a rare cause of late failure after both procedures.

• Eligibility numbers — minimum age 22; women below 49, men below 60; one child older than 1 year; ever married.
• Timing — post-partum within 7 days (minilap only); interval at 6 weeks; with MTP concurrently or within 7 days.
• Technique — modified Pomeroy with 1-0 chromic catgut (minilap); Falope ring without cautery (laparoscopic); site = isthmus 2–3 cm from cornu.
• NSV — single puncture, perivasal block, vas fixed at junction of upper third and lower two-thirds.
• After vasectomy — use condoms until semen analysis at about 3 months confirms azoospermia.
• Complications — sperm granuloma after vasectomy; ectopic pregnancy after tubal failure.
• Certificates — one month after tubectomy; three months (azoospermia) after vasectomy. Practise recent stems in the NEET PG PYQ bank.