NCERT Solutions for Class 12 Biology Chapter 3: Reproductive Health (NCERT 2026–27)
These Class 12 Biology Chapter 3 solutions cover Reproductive Health in full — reproductive health problems and strategies, population stabilisation, contraceptive methods, Medical Termination of Pregnancy (MTP), Sexually Transmitted Infections (STIs) and infertility with Assisted Reproductive Technologies (ART). Every NCERT exercise question is reproduced verbatim and answered in exam-ready CBSE style, plus extra practice, MCQs and Assertion–Reason sets for board preparation.
According to the WHO, reproductive health means total well-being in all aspects of reproduction — physical, emotional, behavioural and social. India was among the first countries to launch national-level family planning programmes (1951), now run as Reproductive and Child Health Care (RCH) programmes. The chapter explains how awareness, sex education, medical support and a statutory ban on amniocentesis for sex-determination build a reproductively healthy society. It then discusses population stabilisation and a wide range of contraceptive methods (natural, barrier, IUDs, oral pills, injectables, implants and surgical sterilisation), Medical Termination of Pregnancy (MTP), common STIs and their prevention, and finally infertility with Assisted Reproductive Technologies such as IVF–ET, ZIFT, GIFT, ICSI, IUT, AI and IUI.
Key Concepts & Definitions
Reproductive health: total physical, emotional, behavioural and social well-being related to reproduction (WHO definition).
RCH programmes: Reproductive and Child Health Care programmes that create awareness and provide facilities for a reproductively healthy society.
Amniocentesis: a test where amniotic fluid is analysed for foetal genetic disorders (e.g. Down syndrome, haemophilia, sickle-cell anaemia); its misuse for sex-determination is statutorily banned in India.
Contraceptive categories: Natural/Traditional (periodic abstinence, withdrawal/coitus interruptus, lactational amenorrhea), Barrier (condoms, diaphragms, cervical caps, vaults with spermicides), IUDs (non-medicated, copper-releasing, hormone-releasing), Oral pills (e.g. Saheli), Injectables, Implants, and Surgical methods (vasectomy in males, tubectomy in females).
MTP (induced abortion): intentional termination of pregnancy before full term; legalised in India in 1971 and considered relatively safe in the first trimester (up to 12 weeks).
STIs: sexually transmitted infections such as gonorrhoea, syphilis, genital herpes, chlamydiasis, genital warts, trichomoniasis, hepatitis-B and HIV/AIDS.
Infertility: inability to conceive or produce children even after 2 years of unprotected sexual cohabitation, addressed by Assisted Reproductive Technologies (ART) such as IVF–ET, ZIFT, GIFT, ICSI, IUT, AI and IUI.
NCERT Exercises — Complete Solutions
Questions are reproduced verbatim from the NCERT textbook (Reprint 2026–27). Answers are original and written in CBSE board exam style.
1. What do you think is the significance of reproductive health in a society?
ANSWERA reproductively healthy society has people with physically and functionally normal reproductive organs, together with normal emotional and behavioural interactions in all sex-related matters. Its significance includes:(i) It ensures sound physical, mental, emotional and social well-being related to reproduction, so individuals can lead a healthy reproductive life.(ii) It promotes awareness about reproductive organs, adolescence, safe and hygienic sexual practices, STIs and birth control, helping people make informed choices.(iii) It reduces maternal and infant mortality, helps control population growth, ensures early detection and cure of STIs, and provides care to infertile couples — all of which build a socially responsible, healthy society.
2. Suggest the aspects of reproductive health which need to be given special attention in the present scenario.
ANSWERAspects needing special attention today are:(i) Sex education and awareness: introducing sex education in schools and using audio-visual and print media to remove myths and misconceptions.(ii) Family planning and birth control: educating couples about available contraceptive options to build families of desired size and check population growth.(iii) Care of mothers and children: antenatal and post-natal care, importance of breast feeding, and child immunisation.(iv) Prevention of social evils: a statutory ban on amniocentesis for sex-determination to check female foeticide, and awareness against sex-abuse and sex-related crimes.(v) Control of STIs and infertility care: early detection and treatment of STIs and providing assistance to infertile couples.
3. Is sex education necessary in schools? Why?
ANSWERYes, sex education is necessary in schools. Reasons:(i) It provides young people with the right scientific information and discourages belief in myths and misconceptions about sex-related aspects.(ii) It gives proper knowledge about reproductive organs, adolescence and the changes that occur during it, and safe, hygienic sexual practices.(iii) It creates awareness about STIs, AIDS and the importance of avoiding unsafe practices, especially in the adolescent (15–24 years) age group.(iv) It helps adolescents lead a reproductively healthy life and develop a responsible attitude toward sex-related matters.
4. Do you think that reproductive health in our country has improved in the past 50 years? If yes, mention some such areas of improvement.
ANSWERYes, reproductive health in India has improved markedly over the past 50 years. Areas of improvement include:(i) Better awareness about sex-related matters among people.(ii) An increased number of medically assisted deliveries and better post-natal care, leading to a decline in maternal mortality rate (MMR) and infant mortality rate (IMR).(iii) An increased number of couples opting for small families using contraceptives.(iv) Better detection and cure of STIs and overall increased medical facilities for all sex-related problems.(v) Successful assistance to infertile couples through ART, and development of indigenous contraceptives such as Saheli at CDRI, Lucknow.
5. What are the suggested reasons for population explosion?
ANSWERThe suggested reasons for population explosion are:(i) A rapid decline in the death rate due to improved health and medical facilities.(ii) A decline in the maternal mortality rate (MMR).(iii) A decline in the infant mortality rate (IMR) through better post-natal care and immunisation.(iv) An increase in the number of people in the reproducible age group.Together with better living conditions, these factors caused the population growth rate to remain high (about 20/1000/year as per the 2011 census).
6. Is the use of contraceptives justified? Give reasons.
ANSWERYes, the use of contraceptives is justified under appropriate circumstances:(i) They help prevent unwanted pregnancies and allow couples to delay or space children for personal reasons.(ii) They play a significant role in checking the uncontrolled growth of population, supporting the ‘Hum Do Hamare Do’ goal of small families.(iii) Barrier methods such as condoms additionally protect against STIs and AIDS.However, contraceptives are not regular requirements for the maintenance of reproductive health; they are used against a natural event (conception), and possible side-effects (nausea, abdominal pain, breakthrough/irregular bleeding) should be considered. Their selection should be made in consultation with qualified medical professionals.
7. Removal of gonads cannot be considered as a contraceptive option. Why?
ANSWERAn ideal contraceptive should be user-friendly, effective, reversible, and should not interfere with the sexual drive, desire or sexual act of the user.Removal of gonads (testes in males, ovaries in females) is irreversible — it permanently stops the production of gametes as well as sex hormones, causing loss of secondary sexual characters and sexual drive. Hence it is a mutilating, permanent procedure, not a contraceptive method, which is meant only to prevent fertilisation while keeping reproductive ability and sexual life otherwise normal.
8. Amniocentesis for sex determination is banned in our country. Is this ban necessary? Comment.
ANSWERYes, the ban is necessary. Amniocentesis is a foetal diagnostic test in which amniotic fluid is analysed to detect genetic disorders such as Down syndrome, haemophilia and sickle-cell anaemia — a useful and valid medical purpose.However, it was widely misused to determine the sex of the foetus, often followed by Medical Termination of Pregnancy if the foetus was found to be female. This led to large-scale female foeticide, a social evil that distorts the sex ratio and is illegal and unethical. Therefore a statutory ban on amniocentesis for sex-determination is fully justified, while its use for genuine medical diagnosis is allowed.
9. Suggest some methods to assist infertile couples to have children.
ANSWERInfertile couples can be assisted through Assisted Reproductive Technologies (ART):(i) IVF–ET (Test Tube Baby programme): ova and sperms are collected and fertilised in the laboratory to form a zygote/early embryo, which is then transferred to the female.(ii) ZIFT (Zygote Intra Fallopian Transfer): the zygote or early embryo (up to 8 blastomeres) is transferred into the fallopian tube.(iii) IUT (Intra Uterine Transfer): an embryo with more than 8 blastomeres is transferred into the uterus.(iv) GIFT (Gamete Intra Fallopian Transfer): an ovum from a donor is transferred into the fallopian tube of a female who cannot produce one but can support fertilisation.(v) ICSI (Intra Cytoplasmic Sperm Injection): a sperm is directly injected into the ovum to form an embryo in the laboratory.(vi) AI / IUI (Artificial Insemination / Intra-Uterine Insemination): semen from the husband or a healthy donor is introduced artificially into the vagina or uterus — useful in cases of low sperm count or inability to inseminate.Where such corrections are not possible, legal adoption is one of the best options for parenthood.
10. What are the measures one has to take to prevent from contracting STDs?
ANSWERThe simple principles to stay free of STIs/STDs are:(i) Avoid sex with unknown partners and multiple partners.(ii) Always try to use condoms during coitus.(iii) In case of any doubt, go to a qualified doctor for early detection and get complete treatment if diagnosed with an infection.Additionally, avoid sharing of injection needles and surgical instruments, and ensure safe blood transfusion, since infections like hepatitis-B and HIV can also spread through these routes.
11. State True/False with explanation
(a) Abortions could happen spontaneously too. (True/False)
ANSWERTrue. Abortion need not always be induced; a pregnancy can also be lost naturally and unintentionally. Such a spontaneous loss of the foetus is called a spontaneous abortion or miscarriage.
(b) Infertility is defined as the inability to produce a viable offspring and is always due to abnormalities/defects in the female partner. (True/False)
ANSWERFalse. Infertility is the inability to conceive even after 2 years of unprotected cohabitation, but it is not always due to defects in the female. The reasons may be physical, congenital, disease-related, due to drugs, immunological or psychological, and the problem may lie in the male partner — in fact, more often than not.
(c) Complete lactation could help as a natural method of contraception. (True/False)
ANSWERTrue. During intense lactation following parturition, ovulation and hence the menstrual cycle do not occur (lactational amenorrhea). As long as the mother fully breast-feeds the child, chances of conception are almost nil. However, this method is effective only up to a maximum of about six months after parturition.
(d) Creating awareness about sex related aspects is an effective method to improve reproductive health of the people. (True/False)
ANSWERTrue. Creating awareness about reproductive organs, adolescence, safe and hygienic sexual practices, STIs and birth control through media, schools, parents and teachers is the primary step towards reproductive health, as it helps people make informed and responsible choices.
12. Correct the following statements:
(a) Surgical methods of contraception prevent gamete formation.
ANSWERCorrection: Surgical methods of contraception prevent gamete transport (not gamete formation). In vasectomy and tubectomy, the vas deferens or fallopian tube is cut/tied to block the movement of gametes; gamete formation still continues.
(b) All sexually transmitted diseases are completely curable.
ANSWERCorrection:Not all STIs are completely curable. Except for hepatitis-B, genital herpes and HIV infections, the other STIs are completely curable if detected early and treated properly.
(c) Oral pills are very popular contraceptives among the rural women.
ANSWERCorrection: Oral pills are very popular contraceptives among the urban (educated, working) women rather than rural women.
(d) In E. T. techniques, embryos are always transferred into the uterus.
ANSWERCorrection: In embryo transfer (ET) techniques, embryos are not always transferred into the uterus. An embryo with up to 8 blastomeres (zygote/early embryo) is transferred into the fallopian tube (ZIFT), while an embryo with more than 8 blastomeres is transferred into the uterus (IUT).
Extra Practice Questions
Short Answer Type Questions
Q1. Expand and define the term ‘RCH programme’.
ANSWERRCH stands for Reproductive and Child Health Care programme. It covers a wide range of reproduction-related areas and aims to create awareness among people about reproduction and to provide facilities and support for building a reproductively healthy society.
Q2. How do copper-releasing IUDs prevent conception?
ANSWERCopper-releasing IUDs (e.g. CuT, Cu7, Multiload 375) increase phagocytosis of sperms within the uterus, and the Cu2+ ions released suppress sperm motility and reduce the fertilising capacity of sperms, thereby preventing conception.
Q3. What is ‘Saheli’ and why is it significant?
ANSWERSaheli is an oral contraceptive for females developed by scientists at the Central Drug Research Institute (CDRI), Lucknow. It contains a non-steroidal preparation, is a ‘once a week’ pill, and has very few side-effects with high contraceptive value.
Q4. Differentiate between vasectomy and tubectomy.
ANSWERIn vasectomy (male sterilisation), a small part of the vas deferens is removed or tied through a small incision on the scrotum. In tubectomy (female sterilisation), a small part of the fallopian tube is removed or tied through a small incision in the abdomen or through the vagina. Both block gamete transport and are highly effective but poorly reversible.
Q5. Name any four common sexually transmitted infections (STIs).
ANSWERGonorrhoea, syphilis, genital herpes and chlamydiasis (others include genital warts, trichomoniasis, hepatitis-B and HIV/AIDS).
Long Answer Type Questions
Q1. Describe the various natural and barrier methods of contraception.
ANSWERNatural methods work on avoiding the meeting of ovum and sperm. (i) Periodic abstinence: couples avoid coitus from day 10 to 17 of the menstrual cycle, the fertile period when ovulation may occur. (ii) Withdrawal / coitus interruptus: the male withdraws the penis before ejaculation to avoid insemination. (iii) Lactational amenorrhea: intense lactation after parturition suppresses ovulation, so conception is unlikely up to about six months. These have no side-effects but high failure rates.Barrier methods physically prevent ovum and sperm from meeting. (i) Condoms (male and female), made of thin rubber/latex, cover the penis or the vagina and cervix; they also protect against STIs and AIDS (e.g. ‘Nirodh’). (ii) Diaphragms, cervical caps and vaults are rubber barriers inserted into the female tract to cover the cervix and block sperm entry; they are reusable. Spermicidal creams, jellies and foams are used along with these barriers to increase their efficiency.
Q2. What is MTP? State its significance and mention the conditions under which it is recommended.
ANSWERMedical Termination of Pregnancy (MTP), or induced abortion, is the intentional or voluntary termination of pregnancy before full term. It was legalised in India in 1971 with strict conditions to prevent misuse, and is considered relatively safe during the first trimester (up to 12 weeks); second-trimester abortions are riskier.Significance / conditions: MTP helps to (i) get rid of unwanted pregnancies arising from casual unprotected intercourse, failure of contraceptives, or rape; and (ii) terminate pregnancies that could be harmful or even fatal to the mother, the foetus, or both. The strict legal conditions are important to check indiscriminate and illegal female foeticide. MTPs should be performed only by qualified medical practitioners, not by unqualified quacks, to avoid being unsafe or fatal.
Q3. Explain various Assisted Reproductive Technologies (ART) used to help infertile couples.
ANSWERInfertility is the inability to conceive even after 2 years of unprotected cohabitation. Where corrective treatment is not possible, ART is used:IVF–ET (Test Tube Baby): ova and sperms are collected and fused in the laboratory under simulated conditions; the zygote/early embryo is then transferred to the female. ZIFT: a zygote or embryo with up to 8 blastomeres is placed in the fallopian tube. IUT: an embryo with more than 8 blastomeres is placed in the uterus. GIFT: an ovum from a donor is transferred into the fallopian tube of a female who cannot produce her own ovum. ICSI: a sperm is directly injected into the ovum to form an embryo. AI / IUI: semen from the husband or a healthy donor is introduced artificially into the vagina or uterus, useful for low sperm count or inability to inseminate.These techniques need high precision and expensive instrumentation, so they are available in only a few centres. Legal adoption remains one of the best options for couples seeking parenthood.
MCQs
1. According to WHO, reproductive health includes well-being that is:
(a) only physical (b) only emotional (c) physical, emotional, behavioural and social (d) only social
2. The first family planning programmes in India were initiated in:
(a) 1947 (b) 1951 (c) 1971 (d) 2000
3. ‘Saheli’, an oral contraceptive for females, was developed by:
(a) ICMR (b) CDRI, Lucknow (c) AIIMS (d) WHO
4. Which of the following is a copper-releasing IUD?
8. The transfer of a zygote with up to 8 blastomeres into the fallopian tube is called:
(a) IUT (b) ZIFT (c) GIFT (d) ICSI
9. Lactational amenorrhea is effective as a contraceptive for a maximum of about:
(a) 6 months (b) 1 year (c) 2 years (d) 3 months
10. In ICSI, the embryo is formed by:
(a) transferring an ovum into the fallopian tube (b) injecting a sperm directly into the ovum (c) introducing semen into the uterus (d) blocking the vas deferens
For each Assertion–Reason question, choose: (A) Both true and the Reason correctly explains the Assertion; (B) Both true but the Reason is not the correct explanation; (C) Assertion true, Reason false; (D) Assertion false, Reason true.
A-R 1. Assertion: Removal of gonads cannot be used as a contraceptive method.
Reason: An ideal contraceptive should be reversible and should not interfere with the user’s sexual drive.
A-R 2. Assertion: Use of condoms protects against STIs.
Reason: Condoms act as a barrier and prevent direct contact, so the ejaculated semen does not enter the female reproductive tract.
A-R 3. Assertion: All sexually transmitted infections are completely curable.
Reason: Hepatitis-B, genital herpes and HIV infections are easily cured with antibiotics.
A-R 4. Assertion: Amniocentesis is banned for sex-determination in India.
Reason: It was misused for sex-determination, leading to female foeticide.
A-R 5. Assertion: Infertility is always caused by defects in the female partner.
Reason: The causes of infertility may be physical, congenital, disease-related, immunological or psychological, and may lie in the male too.
Answer key: 1-(A), 2-(A), 3-(D), 4-(A), 5-(D).
Common Mistakes & Exam Tips
Common mistakes to avoid
Writing that surgical methods prevent gamete formation — they prevent gamete transport.
Confusing vasectomy (male, vas deferens) with tubectomy (female, fallopian tube).
Stating that all STIs are curable — hepatitis-B, genital herpes and HIV are exceptions.
Mixing up ZIFT (≤8 blastomeres → fallopian tube) and IUT (>8 blastomeres → uterus).
Saying oral pills are popular among rural women — they are popular among urban/working women.
Assuming infertility is always the female partner’s problem.
How to score full marks in this chapter
Learn the contraceptive categories in order (Natural → Barrier → IUDs → Pills → Injectables/Implants → Surgical) and give one example of each. Remember key full forms (RCH, MTP, STI, IUD, IVF, ET, ZIFT, GIFT, ICSI, IUT, AI, IUI) and the institute behind ‘Saheli’ (CDRI, Lucknow). For value-based questions on amniocentesis or sex education, link the science to the social goal — checking female foeticide and building a responsible society. State the 2-year definition of infertility and the 1971 legalisation of MTP precisely.
Frequently Asked Questions
What is Class 12 Biology Chapter 3 Reproductive Health about?
Chapter 3 explains reproductive health and the RCH programmes, population stabilisation and contraceptive methods (natural, barrier, IUDs, pills, injectables, implants and surgical), Medical Termination of Pregnancy (MTP), sexually transmitted infections (STIs) and their prevention, and infertility with Assisted Reproductive Technologies such as IVF-ET, ZIFT, GIFT, ICSI, IUT and AI.
What is the difference between ZIFT and IUT?
In ZIFT (Zygote Intra Fallopian Transfer), a zygote or early embryo with up to 8 blastomeres is transferred into the fallopian tube. In IUT (Intra Uterine Transfer), an embryo with more than 8 blastomeres is transferred into the uterus.
Why is amniocentesis for sex-determination banned in India?
Amniocentesis is a legitimate test for foetal genetic disorders, but it was misused to determine the sex of the foetus, often leading to female foeticide. To check this social evil and protect the sex ratio, the statutory ban on its use for sex-determination is necessary.
Are these Class 12 Biology Chapter 3 solutions free?
Yes. All ClearStudy NCERT Solutions for Class 12 Biology Reproductive Health are free and follow the official NCERT textbook for the 2026-27 session.
