Chapter 3: Reproductive Health | Summary

World population grew from about 2 billion in 1900 to 6 billion by 2000 and 7.2 billion in 2011. India's population grew from approximately 350 million at independence to over 1.2 billion by May 2011. A rapid decline in death rate, maternal mortality rate (MMR), and infant mortality rate (IMR), along with an increase in people of reproductive age, are the main reasons for this explosion. The 2011 census recorded a growth rate of less than 2 per cent (20/1000/year), which is still alarmingly high.

To combat population growth, the government promotes smaller families through contraceptive methods, statutory raising of the marriageable age (18 for females, 21 for males), and incentives for small families. Contraceptive methods are broadly classified as natural/traditional, barrier, IUDs, oral contraceptives, injectables, implants, and surgical methods. An ideal contraceptive should be user-friendly, effective, reversible, with minimal side effects, and should not interfere with sexual drive or the sexual act.

Natural methods include periodic abstinence (avoiding coitus from day 10–17 of the menstrual cycle), coitus interruptus (withdrawal before ejaculation), and the lactational amenorrhea method (effective only up to 6 months post-parturition). Barrier methods include condoms (male and female), diaphragms, cervical caps, and vaults, often used with spermicidal creams. Condoms additionally protect against STIs and AIDS. Intra Uterine Devices (IUDs) include non-medicated (Lippes loop), copper-releasing (CuT, Cu7, Multiload 375), and hormone-releasing types (Progestasert, LNG-20). IUDs increase phagocytosis of sperms, suppress sperm motility, and may make the uterus unsuitable for implantation.

Oral contraceptive pills contain progestogens or progestogen–estrogen combinations, taken daily for 21 days. They inhibit ovulation and implantation and alter cervical mucus quality. Saheli is a non-steroidal, once-a-week oral contraceptive developed by CDRI, Lucknow, with high contraceptive value and few side effects. Injectables and implants work similarly to pills but with longer effective periods. Emergency contraceptives (progestogens, progestogen-estrogen combinations, or IUDs) used within 72 hours of unprotected coitus can prevent pregnancy. Surgical methods — vasectomy in males and tubectomy in females — are terminal methods that block gamete transport; they are highly effective but have poor reversibility.

Medical Termination of Pregnancy (MTP), or induced abortion, refers to intentional termination of pregnancy before full term. About 45–50 million MTPs are performed globally per year, accounting for one-fifth of all conceived pregnancies. Government of India legalised MTP in 1971 under strict conditions to prevent misuse, particularly to curb illegal female foeticides. MTPs are considered relatively safe in the first trimester (up to 12 weeks) and are riskier in the second trimester.

The MTP (Amendment) Act, 2017 allows termination within the first 12 weeks on the opinion of one registered medical practitioner and up to 24 weeks with the opinion of two practitioners. Grounds include risk to the mother's life or grave physical/mental health injury, and substantial risk of the child being seriously handicapped. A major concern is illegal MTPs performed by unqualified practitioners and misuse of amniocentesis for sex determination followed by female foeticide, both of which are dangerous and illegal.

Sexually transmitted infections (STIs), also called venereal diseases (VD) or reproductive tract infections (RTI), are diseases transmitted through sexual intercourse. Common STIs include gonorrhoea, syphilis, genital herpes, chlamydiasis, genital warts, trichomoniasis, hepatitis-B, and HIV/AIDS. Some infections like hepatitis-B and HIV can also be transmitted through shared needles, blood transfusion, or from an infected mother to the foetus. Except for hepatitis-B, genital herpes, and HIV, most STIs are completely curable if detected early.

STIs are most prevalent in the 15–24 age group. Early symptoms include itching, fluid discharge, slight pain, and swellings in the genital region; infected females may be asymptomatic. Untreated STIs can lead to pelvic inflammatory diseases (PID), abortions, still births, ectopic pregnancies, infertility, or cancer of the reproductive tract. Prevention includes avoiding sex with unknown/multiple partners, consistent use of condoms, and seeking early medical diagnosis and complete treatment.

Infertility is the inability to conceive children despite unprotected sexual cohabitation. Causes can be physical, congenital, disease-related, drug-induced, immunological, or psychological and can lie in either the male or female partner. Assisted Reproductive Technologies (ART) help infertile couples have children. In Vitro Fertilisation (IVF) involves fertilising ova and sperms in a laboratory and then transferring the embryo; embryos with up to 8 blastomeres are transferred to the fallopian tube (ZIFT) and those with more blastomeres to the uterus (IUT — Intra Uterine Transfer).

Other ART methods include GIFT (Gamete Intra Fallopian Transfer), which involves transferring a donor ovum into a recipient's fallopian tube; ICSI (Intra Cytoplasmic Sperm Injection), where a sperm is directly injected into an ovum; and Artificial Insemination (AI), where semen from the husband or a donor is introduced into the vagina or uterus (IUI — Intra Uterine Insemination). These techniques require specialised professionals and expensive equipment, making them available at only a few centres. Legal adoption is also encouraged as an alternative for infertile couples.

Chapter 3 presents reproductive health as a holistic concept encompassing physical, emotional, behavioural, and social well-being. India's national RCH programmes, population control measures, diverse contraceptive options, legalised MTP, STI prevention strategies, and ART methods collectively form a comprehensive framework aimed at building a reproductively healthy society. The chapter highlights that both awareness and access to medical facilities are equally critical to achieving this goal.

From an examination perspective, this chapter is extremely important for CBSE Class 12 Biology. Questions frequently appear on the types of contraceptives and their mechanisms, ART methods and their differences, MTP legislation, STIs and their complications, and population explosion causes. Understanding the distinctions between methods such as ZIFT vs IUT, vasectomy vs tubectomy, and natural vs barrier contraceptives is essential for scoring well in board examinations.