Home/Biology/Chapter 3 — Reproductive Health
Class 12 Biology

Reproductive Health

RCH programmes, population stabilisation, contraceptive methods, MTP, STIs, infertility and ART — complete NCERT coverage with diagrams, solved examples, MCQs, A-R and PYQs.

5NCERT Sections
10MCQs
5Assertion–Reason
4PYQs
Section 01

Reproductive Health — Problems & Strategies

3.1What is Reproductive Health?

WHO definition

Reproductive health means a total well-being in all aspects of reproduction — physical, emotional, behavioural and social.

  • India was among the first countries to start national action plans — 'Family Planning' (1951).
  • Now operating as Reproductive and Child Health Care (RCH) programmes.
  • Awareness: audio-visual & print media, parents, teachers, friends and sex education in schools remove myths and misconceptions.
  • Facilities: medical care for pregnancy, delivery, STIs, abortions, contraception, menstrual problems and infertility.
  • Statutory ban on amniocentesis for sex-determination checks female foeticide. Amniocentesis tests foetal cells in amniotic fluid for genetic disorders (Down syndrome, haemophilia, sickle-cell anaemia).
  • Saheli — a once-a-week non-steroidal oral contraceptive, developed at CDRI, Lucknow.
Signs of improved reproductive health

Lower maternal (MMR) and infant (IMR) mortality, more medically assisted deliveries, better STI detection, smaller families.

Section 02

Population Stabilisation & Birth Control

3.2Population Explosion

  • World population: 2 billion (1900) → 6 billion (2000) → 7.2 billion (2011).
  • India: about 350 million (1947) → over 1.2 billion (May 2011).
  • Causes: fall in death rate, MMR and IMR; more people in reproductive age.
  • Census 2011 growth rate: <2% (i.e. 20/1000/year).
  • Measures: Hum Do Hamare Do, one-child norm, marriageable age raised to 18 (female) and 21 (male), incentives for small families.
Ideal contraceptive

User-friendly, easily available, effective, reversible, with no/least side-effects and no interference with sexual drive or act.

V1Contraceptive Methods — Classification

Seven categories of contraceptive methods Contraceptive Methods Natural Barrier IUDs Oral pills Injectables Implants Periodic abstinence Coitus interruptus Lactational amenorrhea Condoms (M/F) Diaphragm, cervical cap Vaults + spermicides Lippes loop CuT, Cu7, Multiload Progestasert, LNG-20 Progestogen ± estrogen 21 days, then 7-day gap Saheli (weekly) Progestogen ± estrogen; long action Under the skin; long-acting Surgical (terminal) — Sterilisation Vasectomy (male: vas deferens) · Tubectomy (female: fallopian tube)
Seven categories of contraception — surgical methods are terminal with poor reversibility.

3.2.1Methods in Detail

Method Key points
Natural Avoid ovum–sperm meeting. Periodic abstinence: avoid coitus on day 10–17 (fertile period). Withdrawal: penis withdrawn before ejaculation. Lactational amenorrhea: effective only up to 6 months post-partum with full breast-feeding. No side effects, but high failure rate.
Barrier Condoms (rubber/latex; Nirodh) also protect against STIs and AIDS. Diaphragms, cervical caps and vaults are reusable and block the cervix; spermicidal creams, jellies and foams increase efficiency.
IUDs Inserted by doctors/nurses. Non-medicated (Lippes loop), copper-releasing (CuT, Cu7, Multiload 375), hormone-releasing (Progestasert, LNG-20). Cu ions suppress sperm motility and fertilising capacity; IUDs increase phagocytosis of sperms. Hormonal IUDs make the uterus unsuitable for implantation and the cervix hostile to sperms. Ideal for spacing children.
Pills Small doses of progestogens or progestogen–estrogen; 21 days, starting within first 5 days of cycle, then 7-day gap. Inhibit ovulation and implantation, alter cervical mucus.
Injectables / Implants Similar action to pills but much longer effective period.
Emergency Progestogen/estrogen or IUDs within 72 hours of unprotected coitus or rape.
Surgical Vasectomy — part of vas deferens removed/tied via scrotal incision. Tubectomy — part of fallopian tube removed/tied. Highly effective, very poor reversibility.
Side effects (not very significant): nausea, abdominal pain, breakthrough bleeding, irregular menstrual bleeding, even breast cancer. Contraceptives should be chosen only after consulting a qualified doctor.
Section 03

Medical Termination of Pregnancy (MTP)

3.3MTP / Induced Abortion

Definition

Intentional or voluntary termination of pregnancy before full term.

  • About 45–50 million MTPs/year worldwide — roughly 1/5th of all conceived pregnancies.
  • Legalised in India in 1971 with strict conditions; MTP (Amendment) Act, 2017 aims to reduce illegal abortion and maternal mortality.
  • Up to 12 weeks: opinion of one registered medical practitioner. 12–24 weeks: two practitioners required.
  • Why: unprotected intercourse, contraceptive failure, rape, or when pregnancy risks the mother's/foetus's life or health.
  • Safe in the first trimester (up to 12 weeks); second-trimester abortions are much riskier.
  • Misuse of amniocentesis for sex determination followed by MTP is illegal; many MTPs by quacks are unsafe and can be fatal.
Section 04

Sexually Transmitted Infections (STIs)

3.4STIs / VD / RTI

Infections transmitted through sexual intercourse: gonorrhoea, syphilis, genital herpes, chlamydiasis, genital warts, trichomoniasis, hepatitis-B, HIV/AIDS.

  • Hepatitis-B and HIV also spread via shared needles, surgical instruments, blood transfusion and from infected mother to foetus.
  • All except hepatitis-B, genital herpes and HIV are completely curable if detected and treated early.
  • Early symptoms: itching, discharge, slight pain, swelling in the genital region. Females are often asymptomatic.
  • Complications: PID, abortions, stillbirths, ectopic pregnancies, infertility, reproductive-tract cancer.
  • Highest incidence in the 15–24 years age group.
Prevention

(i) Avoid sex with unknown/multiple partners. (ii) Always use condoms. (iii) See a qualified doctor early and complete the treatment.

Section 05

Infertility & Assisted Reproductive Technologies

3.5Infertility

Inability to produce children despite unprotected cohabitation (NCERT summary: even after 2 years). Causes: physical, congenital, diseases, drugs, immunological, psychological. Often the problem lies with the male partner.

V2Assisted Reproductive Technologies (ART)

IVF, ET, GIFT, ICSI, AI Ovum (wife/donor) Sperm (husband/donor) IVF in laboratory → zygote / early embryo ZIFT zygote / ≤8 blastomeres → fallopian tube IUT >8 blastomeres → uterus GIFT donor ovum → fallopian tube of female who cannot produce ovum ICSI sperm injected directly into ovum (intra-cytoplasmic sperm injection) AI / IUI semen introduced into vagina or uterus (low sperm count / inability to inseminate) Adoption — legal option for parenthood
IVF → embryo transfer (ZIFT if up to 8 blastomeres, IUT if more); GIFT, ICSI and AI are other ART methods.
Remember: IVF = test-tube baby programme. These techniques are costly, need specialised professionals and are available in few centres.
Practice

📝 Solved Examples with Step Marking

📋 2 Marks

Q1. What is lactational amenorrhea? Why is it a natural contraceptive method?

Meaning 1 Mark

Absence of menstruation during intense lactation after parturition.

Why contraceptive 1 Mark

Ovulation and the cycle do not occur, so conception chances are almost nil while the mother fully breast-feeds — effective up to a maximum of 6 months.

📋 3 Marks

Q2. Explain how Cu-releasing IUDs act as contraceptives.

Examples 1 Mark

CuT, Cu7, Multiload 375 — inserted into the uterus by a doctor.

Action 2 Marks

Increase phagocytosis of sperms in the uterus; Cu ions suppress sperm motility and fertilising capacity.

📋 3 Marks

Q3. Differentiate between ZIFT and IUT.

ZIFT 1.5 Marks

Zygote or early embryo (up to 8 blastomeres) transferred into the fallopian tube.

IUT 1.5 Marks

Embryo with more than 8 blastomeres transferred into the uterus.

Test Yourself

✍️ MCQ Practice

Score: 0 / 10
New Pattern

🎯 Assertion–Reason

(A) Both true, R explains A. (B) Both true, R does NOT explain A. (C) A true, R false. (D) A false, R true.

Score: 0 / 5
Exam Focus

📖 Previous Year Questions

Board

Q. Name two contraceptive methods that also protect from STIs. Which is the most widely accepted IUD-based method in India?

Answer 2 Marks

Male and female condoms protect against STIs and AIDS. IUDs (e.g. CuT) are among the most widely accepted contraceptives in India.

Board

Q. What is amniocentesis? Why is its use for sex determination banned?

Answer 2 Marks

Amniotic fluid is analysed for foetal cells to detect genetic disorders (Down syndrome, haemophilia, sickle-cell anaemia). It is banned for sex determination because it leads to female foeticide.

Board

Q. Write the conditions under which MTP is permitted in India.

Answer 3 Marks

Legalised in 1971. Up to 12 weeks — one registered medical practitioner; 12–24 weeks — two practitioners. Grounds: risk to the mother's life or physical/mental health, or substantial risk of serious physical/mental abnormality in the child.

Board

Q. Explain IVF, ZIFT, GIFT and ICSI briefly.

Answer 3 Marks

IVF: fertilisation outside the body. ZIFT: zygote/≤8-blastomere embryo into fallopian tube. GIFT: donor ovum into fallopian tube. ICSI: sperm injected directly into ovum.