Surgical Methods: Vasectomy and Tubectomy (Sterilisation)
Biology · Reproductive Health · NEET
Sterilisation is a permanent surgical contraceptive that blocks gamete transport. In males it is called vasectomy (a small part of the vas deferens is removed or tied), and in females it is called tubectomy (a small part of the fallopian tube is removed or tied). Memory hook: "Vas = male, Tube = female" — both cut the road, not the factory (sperm and eggs are still made).
Vasectomy cuts the vas deferens (male) and tubectomy cuts the fallopian tube (female). Both block the path of gametes — gamete production (spermatogenesis, ovulation) still continues.
Your doubts, answered
Is vasectomy for males or females, and what about tubectomy?
Vasectomy is the sterilisation method in the male — a small part of the vas deferens is removed or tied through a small incision on the scrotum. Tubectomy is the sterilisation method in the female — a small part of the fallopian tube is removed or tied through a small incision in the abdomen or through the vagina. Simple hook: Vas deferens for males (Vasectomy), Tube (fallopian) for females (Tubectomy).
Does vasectomy stop sperm production (spermatogenesis)?
No. This is the most tested point. Vasectomy only blocks the vas deferens, so sperm cannot be transported into the semen. Spermatogenesis still continues normally in the testes, and sperm are still present in the epididymis. So it is wrong to say vasectomy prevents spermatogenesis — it prevents gamete transport.
Where is sperm still present after a vasectomy — epididymis or semen?
After vasectomy, sperm are still produced and are still present in the epididymis (before the cut). They are absent in the seminal fluid (semen), because the vas deferens block stops them from moving forward. NEET flips this: a statement saying 'no sperm occurs in epididymis' is INCORRECT.
What exactly does tubectomy block in the female?
Tubectomy removes or ties a part of the fallopian tube. This stops the ovum (egg) and sperm from meeting, so fertilisation cannot happen. The ovary still releases eggs (ovulation continues), but the egg can no longer travel down to meet sperm.
Can vasectomy and tubectomy be reversed?
NCERT states these techniques are highly effective but their reversibility is very poor. That is why sterilisation is treated as a terminal (permanent) method, chosen by couples who do not want any more children. NEET may describe this as 'irreversible sterility'.
⚠️ The NEET trap ✗ Vasectomy prevents spermatogenesis (stops sperm from being made). ✓ Vasectomy blocks gamete TRANSPORT by cutting the vas deferens; spermatogenesis continues in the testes and sperm remain in the epididymis — they just cannot enter the semen. 🧠 Read the verb carefully: transport vs production.
Real NEET questions
NEET 2016 Phase 1
Which of the following approaches does not give the defined action of contraceptive?
A · Barrier methods – Prevent fertilization
B · Intra uterine devices – Increase phagocytosis of sperms, suppress sperm motility and fertilizing capacity of sperms
C · Hormonal contraceptives – Prevent / retard entry of sperms, prevent ovulation and fertilization
D · Vasectomy – Prevents spermatogenesis ✓
Solution: Vasectomy cuts or ties the vas deferens, which blocks gamete transport so sperms cannot reach the semen. It does NOT stop spermatogenesis, which continues in the testes — so pairing (d) is the wrong (incorrectly defined) action. The other three actions are correctly defined.
NEET 2016 Phase 2
Which of the following is incorrect regarding vasectomy?
A · No sperm occurs in seminal fluid
B · No sperm occurs in epididymis ✓
C · Vasa deferentia is cut and tied
D · Irreversible sterility
Solution: After vasectomy the vas deferens is cut/tied, so sperm are still produced and remain present in the epididymis — statement (b) 'No sperm occurs in epididymis' is INCORRECT. Sperm are absent only in the seminal fluid (a), the vasa deferentia are cut and tied (c), and reversibility is very poor giving terminal sterility (d).
Solved Reproductive Health NEET PYQs
Try the real previous-year questions from this chapter — each with the answer and a full solution.
Sterilisation is a permanent surgical contraceptive method that blocks gamete transport to prevent conception. It is called vasectomy in males and tubectomy in females.
What is the difference between vasectomy and tubectomy?
Vasectomy is done in males by removing or tying a part of the vas deferens; tubectomy is done in females by removing or tying a part of the fallopian tube. Both block the gametes from meeting but neither stops gamete production.
Is sterilisation reversible?
According to NCERT, vasectomy and tubectomy are highly effective but their reversibility is very poor, so they are considered terminal (permanent) methods.
Does tubectomy stop ovulation?
No. In tubectomy the ovary still releases eggs, but the ovum and sperm cannot meet because the fallopian tube is blocked, so fertilisation is prevented.
Why is sterilisation called a surgical method?
Because it requires a minor surgical intervention (a small incision) to cut and tie the vas deferens or the fallopian tube, unlike barrier, hormonal or IUD methods.
