Amniocentesis: What It Detects and Why It Is Banned for Sex Determination
Biology · Reproductive Health · NEET
Amniocentesis is a prenatal test in which a small amount of amniotic fluid around the developing foetus is taken to study the fetal cells and dissolved substances. Its correct medical use is to detect genetic disorders (like Down syndrome, haemophilia, sickle-cell anaemia) and check the survivability of the foetus. But because it can also reveal the baby's sex, it is misused for female foeticide, so it is statutorily banned for sex determination in India. Memory hook: "Amnio finds DISEASE, not the SEX of the baby."
Amniocentesis: a needle takes amniotic fluid; fetal cells are analysed to detect genetic disorders. Using it to find the baby's sex is banned in India.
Your doubts, answered
What exactly does amniocentesis detect?
It analyses the fetal cells and dissolved substances in the amniotic fluid to find certain genetic and chromosomal disorders, such as Down syndrome, haemophilia and sickle-cell anaemia. It is also used to check the survivability of the foetus. For NEET, remember these three example disorders directly from NCERT.
Why is amniocentesis banned for sex determination in India?
Because the same test can reveal the sex of the foetus, some people misused it: if the foetus was found to be female, it was aborted (female foeticide). To legally check this increasing menace of female foeticide, the government put a statutory ban on using amniocentesis for sex determination.
Is the ban itself part of a government programme?
Yes. The statutory ban on amniocentesis for sex determination is mentioned as one of the strategies/programmes under Reproductive and Child Health Care. Note carefully: the STRATEGY is the BAN, not the use of amniocentesis for sex determination. NEET has repeatedly twisted this.
Can amniocentesis detect structural defects like cleft palate?
No. Amniocentesis detects chromosomal and genetic disorders (like Down syndrome) from cell and fluid analysis. A structural malformation such as cleft palate is not detected by amniocentesis. This exact point was tested in NEET 2016.
When is amniocentesis usually done?
It is usually performed when the woman is about 14 to 16 weeks pregnant. This timing point has appeared as a correct statement in NEET, so keep it in mind alongside the disorders it detects.
⚠️ The NEET trap ✗ Amniocentesis for sex determination is a strategy of the Reproductive and Child Health Care programme. ✓ The statutory BAN on amniocentesis for sex determination is the strategy; amniocentesis itself is meant to detect genetic disorders. 🧠 NTA swaps 'ban on amniocentesis' with 'use of amniocentesis'. The programme's strategy is always the BAN, never the sex-determination use.
Real NEET questions
NEET 2016 Phase 1
In context of Amniocentesis, which of the following statement is incorrect?
A · It is usually done when a woman is between 14 - 16 weeks pregnant
B · It is used for prenatal sex determination
C · It can be used for detection of Down syndrome
D · It can be used for detection of Cleft palate ✓
Solution: Amniocentesis analyses fetal cells and dissolved substances to detect chromosomal/genetic disorders such as Down syndrome, haemophilia and sickle-cell anaemia. It cannot detect cleft palate, a structural malformation, so statement (D) is incorrect. It can technically reveal sex (though this use is banned) and is usually done at 14-16 weeks, so those statements are correct.
NEET 2023 Phase 1
Assertion A: Amniocentesis for sex determination is one of the strategies of Reproductive and Child Health Care programme. Reason R: Ban on amniocentesis checks increasing menace of female foeticide. Choose the correct answer.
A · Both A and R are true and R is the correct explanation of A.
B · Both A and R are true but R is NOT the correct explanation of A.
C · A is true but R is false.
D · A is false but R is true. ✓
Solution: Assertion A is false: it is the statutory BAN on amniocentesis for sex determination (not its use) that is a programme strategy. Reason R is true: this ban is enforced to legally check the increasing menace of female foeticide. Hence A is false but R is true.
NEET 2023 Phase 2
Which of the following statements are correct? (A) Reproductive health refers to total well-being in all aspects of reproduction. (B) Amniocentesis is legally banned for sex determination in India. (C) 'Saheli' - a new oral contraceptive for females was developed in collaboration with ICMR (New Delhi). (D) Amniocentesis is used to determine genetic disorders and survivability of foetus.
A · (A), (B) and (D) only ✓
B · (A) and (C) only
C · (B) and (C) only
D · (D) and (C) only
Solution: (A), (B) and (D) are correct: reproductive health is total well-being; amniocentesis is banned for sex determination; and it detects genetic disorders and foetal survivability. (C) is false because Saheli was developed at the Central Drug Research Institute (CDRI), Lucknow, not ICMR.
Solved Reproductive Health NEET PYQs
Try the real previous-year questions from this chapter — each with the answer and a full solution.
No. Amniocentesis is allowed for its correct medical purpose of detecting genetic disorders and checking foetal survivability. Only its use for sex determination is statutorily banned.
Which three genetic disorders does NCERT list for amniocentesis?
Down syndrome, haemophilia and sickle-cell anaemia. These are the safest examples to write in NEET.
What fluid is used in amniocentesis?
Amniotic fluid, the fluid surrounding the developing foetus. Fetal cells and dissolved substances in it are analysed.
How is amniocentesis linked to female foeticide?
When misused for sex determination, a foetus found to be female was often aborted by MTP, which is illegal. This is why the sex-determination use is banned.
