Reproductive Health

NEET Ug . NEET Zoology . Zoology . Reproductive Health

Chapter 8: Reproductive Health

Ch 8

NEET Zoology

NEET Ug

Introduction

Concepts of Reproductive Health

  • Reproductive health means healthy reproductive organs with normal functions.
  • Includes physical, emotional, behavioural, and social well-being related to reproduction.
  • WHO defines it as total well-being in all reproductive aspects.
  • Healthy individuals have normal reproductive organs and positive emotional and behavioural interactions in sexual matters.

Memory Aids

  • Reproductive health = Physical + Emotional + Social well-being.
  • WHO = Total reproductive well-being.

Quick Checkpoints

  • What does reproductive health encompass?
  • How does WHO define reproductive health?
  • What are the components of reproductive well-being?

Reproductive Health Problems and Strategies

Problems and Government Initiatives

  • India initiated national programmes for reproductive health, called Reproductive and Child Health care (RCH) programmes.
  • RCH aims to raise awareness on reproductive organs, adolescence, STDs, and secondary sexual characters.
  • Key programmes: Maternal and child health services, family planning.
  • Major problems: Overpopulation, early marriage, maternal health issues.

Strategies for Improvement

  • Family planning programme started in 1951.
  • Sex education in schools to correct myths and misconceptions.
  • Awareness of birth control devices, prenatal and postnatal care, and equal child importance.
  • Prevention of sex abuse and sex-related crimes through awareness.
  • Medical support for menstrual issues, infertility, pregnancy, contraception, abortions, and STDs.
  • Use of advanced techniques and strategies for better reproductive health care.

Memory Aids

  • RCH = Awareness + Health services + Family planning.
  • Strategies = Family planning + Sex education + Medical care + Crime prevention.

Quick Checkpoints

  • What are the main goals of RCH programmes?
  • List major reproductive health problems in India.
  • What strategies help achieve reproductive health?

Amniocentesis

Test and Uses

  • Fetal test based on chromosomal analysis of amniotic fluid.
  • Detects genetic disorders: Down syndrome, haemophilia, sickle cell anaemia.
  • Assesses fetus survivability.
  • Misused for fetal sex determination leading to female feticide.
  • Legally banned for sex determination to prevent female feticide.

Memory Aids

  • Amniocentesis = Genetic test + Fetal health check.
  • Sex determination misuse banned.

Quick Checkpoints

  • What disorders can amniocentesis detect?
  • Why is sex determination by amniocentesis banned?
  • What is the basis of amniocentesis testing?

Population Stabilisation and Birth Control

Population Growth and Control

  • Population explosion: rapid increase in population over a short period.
  • World population rose from 2 billion (1900) to 7.2 billion (2011).
  • India's population grew from 350 million (independence) to 1.2 billion (2011).
  • Population: total individuals of a species in an area at a time.
  • Demography: scientific study of human population.
  • Population increase due to decline in death rate, MMR, IMR, and more people in reproductive age.
  • 2011 census: growth rate < 2% (20/1000/year), risking scarcity of essentials.
  • Government measures: promote smaller families, raise marriage age (female 18, male 21), incentives for small families.
  • Slogan: Hum Do Hamare Do (We two, our two) encourages two-child norm.

Memory Aids

  • Population = Species count in area.
  • Demography = Study of population.
  • Hum Do Hamare Do = Two-child norm slogan.

Quick Checkpoints

  • What factors caused population explosion?
  • Define demography.
  • What government steps control population growth?

Birth Control or Contraception

Definition and Principles

  • Birth control/contraception: regulation of conception to limit offspring.
  • Prevents fertilisation by blocking sperm transport, ovulation, or embryo implantation.
  • Ideal contraceptive: user-friendly, effective, reversible, minimal side effects, no sexual interference.
  • Methods: temporary and permanent.

Memory Aids

  • Birth control = Prevent fertilisation.
  • Ideal contraceptive = Easy, safe, reversible.

Quick Checkpoints

  • What are the targets of birth control?
  • Characteristics of an ideal contraceptive?
  • Types of contraceptive methods?

Temporary Methods of Birth Control

Types and Details

  • Used to postpone or space births; require regular use.
  • Includes natural, barrier, chemical, IUCDs, oral pills, hormone injections, and implants.
  • Natural methods: avoid sperm-ovum meeting.
    • Periodic abstinence (Rhythm): avoid intercourse days 10-17 (fertile period).
    • Coitus interruptus (Withdrawal): male withdraws before ejaculation.
    • Lactational amenorrhea: no ovulation during intense breastfeeding (up to 6 months).
    Low side effects but higher failure risk.
  • Barrier methods: physical barriers prevent sperm entry.
    • Condoms: male (Nirodh) and female (femidoms).
    • Diaphragms, cervical caps, vaults: rubber barriers covering cervix, reusable.
    • Condoms also protect against STIs and AIDS.
  • Chemical methods: spermicidal creams, jellies, foams used with barriers.
    • Contain lactic acid, citric acid, boric acid, zinc sulphate, potassium permanganate.
    • Sponge ('Today') and cream (Delfin) are spermicidal products, less reliable.
  • Intrauterine Contraceptive Devices (IUCDs): plastic/metal devices inserted in uterus.
    • Non-medicated (e.g., Lippes loop): S-shaped plastic wire increasing sperm phagocytosis.
    • Hormone releasing (e.g., LNG-20, progestasert): make uterus hostile to implantation and sperm.
    • Copper releasing (e.g., CuT, Cu7, Multiload 375): Cu ions reduce sperm motility and fertilisation.
    • Disadvantages: expulsion risk (10-15%), uterine perforation, infection, excessive bleeding, pain.
  • Oral contraceptive pills: tablets with progestogens or progestogen-estrogen.
    • Combined pills (e.g., Mala D, Mala N): synthetic progesterone + estrogen, inhibit ovulation.
    • Mini pills (e.g., Saheli): progestin only, non-steroidal, inhibit implantation.
    • Saheli: weekly dose, safe long-term, minor side effect delayed menstruation (8%).
    • Side effects: risk of intravascular clotting, acne, weight gain, depression, hypertension, nausea.
  • Hormone injections and subcutaneous implants:
    • Progestogens alone or with estrogen block ovulation, thicken cervical mucus.
    • Emergency contraceptives: effective within 72 hours post-coitus.
    • Hormone injections: convenient, effective, occasional heavy bleeding.
    • Subcutaneous implants: matchstick-sized capsules under arm skin, release progesterone for 5 years.
    • Examples: Depot medroxyprogesterone acetate (DMPA), Norethisterone enanthate (NET-EN).

Memory Aids

  • Natural = Avoid sperm-ovum meeting.
  • Barrier = Physical sperm block.
  • Chemical = Spermicides enhance barriers.
  • IUCD = Uterus device, multiple types.
  • Oral pills = Hormonal, daily intake.
  • Hormone injections/implants = Long-term hormonal control.

Quick Checkpoints

  • List natural methods of contraception.
  • What are barrier methods and examples?
  • Types and function of IUCDs?
  • Difference between combined and mini oral pills?
  • How do hormone implants work?

Permanent Methods of Birth Control

Surgical Sterilisation

  • Also called sterilisation methods; advised as terminal contraception.
  • Blocks gamete transport to prevent conception.
  • Male sterilisation: vasectomy - removal or tying of vas deferens via scrotal incision.
  • Diagram 1 – NEET Zoology Reproductive Health
  • Female sterilisation: tubectomy - removal or tying of fallopian tubes via abdominal or vaginal incision.
  • Highly effective but poor reversibility.
  • Does not affect hormone production or sexual function.
  • Consult medical professionals before choosing method; consider side effects like nausea, pain, irregular bleeding.

Memory Aids

  • Vasectomy = Male sterilisation, vas deferens cut.
  • Tubectomy = Female sterilisation, fallopian tubes cut.
  • Permanent = Blocks gamete transport.

Quick Checkpoints

  • What is vasectomy and its purpose?
  • Describe tubectomy procedure.
  • Why is sterilisation considered permanent?

Images

Hormone Implants

Diagram 2 – NEET Zoology Reproductive Health

Implants are small devices inserted under the skin to release hormones slowly for contraception.

Permanent Birth Control Surgeries

Diagram 3 – NEET Zoology Reproductive Health

Vasectomy and tubectomy surgeries block sperm and egg transport respectively to prevent pregnancy permanently.

Medical Termination of Pregnancy (MTP)

Overview

  • Intentional termination of pregnancy before full term is called Medical Termination of Pregnancy (MTP) or induced abortion.
  • Approximately 45 to 50 million MTPs occur worldwide annually, about 1/5th of all conceived pregnancies.
  • Legalised in India in 1971 with strict conditions to prevent misuse and illegal female feticide.
  • MTP is used to end unwanted pregnancies due to unprotected intercourse, contraceptive failure, or rape.
  • Also performed when pregnancy continuation risks the health of mother, fetus, or both.
  • Safe mostly during the first trimester (up to 12 weeks); second trimester abortions carry higher risks.
  • Many MTPs are done illegally by unqualified persons, posing serious health risks.
  • Misuse of amniocentesis for sex determination followed by MTP is dangerous and discouraged.
  • Effective counselling is essential to prevent unprotected sex and illegal abortions.

Memory Aids

  • MTP: Medical Termination of Pregnancy = Induced abortion before full term.
  • Safe period: First trimester (up to 12 weeks).
  • Legalised India: 1971 with strict conditions.
  • Risks: Illegal MTPs and sex-selective abortions are harmful.

Quick Checkpoints

  • What is the definition of MTP?
  • When was MTP legalised in India?
  • Why are MTPs performed?
  • What is the safest period for MTP?
  • What are the risks of illegal MTPs?
  • Why is misuse of amniocentesis dangerous?
  • How can illegal abortions be prevented?

Sexually Transmitted Infections (STIs)

Overview

  • STIs are infections transmitted mainly through sexual intercourse.
  • Also called venereal diseases (VDs) or reproductive tract infections (RTIs).
  • Transmission modes: sexual contact, sharing needles, surgical instruments, blood transfusion, mother to fetus.
  • Except HIV, hepatitis B, and genital herpes, most STIs are curable if treated early.
  • Early symptoms: itching, swelling, fluid discharge, mild pain.
  • Untreated STIs can cause abortions, stillbirths, ectopic pregnancy, infertility, reproductive tract cancer, pelvic inflammatory disease.
  • High incidence in 15-24 years age group.

Common STIs and Detection

Uploaded image analysis
  • Common STIs: Syphilis, Gonorrhoea, AIDS, Genital herpes, etc.
  • Causal agents: specific bacteria or viruses causing each STI.
  • Detection methods: antibody tests, microscopic examination, DNA-based tests.
  • Accurate diagnosis aids effective treatment and control.

Prevention

  • Avoid sex with unknown or multiple partners.
  • Use condoms consistently during intercourse.
  • Seek early medical advice and complete treatment if infected.

Memory Aids

  • STIs = Sexually Transmitted Infections = VDs = RTIs.
  • Transmission: Sex, Needles, Surgery, Blood, Mother-to-fetus (SNSBM).
  • High risk: Age 15-24 years.
  • Prevention: Avoid unknown partners, Use condoms, Early treatment (AUE).

Quick Checkpoints

  • What are the main transmission routes of STIs?
  • Which STIs are incurable?
  • List common early symptoms of STIs.
  • Why is early detection important?
  • What are key prevention methods?

Infertility

Causes and Diagnosis

  • Inability to conceive despite unprotected sex.
  • Caused by physical, congenital, immunological, or psychological disorders.
  • Specialized clinics diagnose and treat some causes.
  • Assisted reproductive technologies (ART) help infertile couples conceive.

Memory Aids

  • Infertility = No conception despite unprotected sex.
  • ART = Medical help for conception.

Quick Checkpoints

  • What are the main causes of infertility?
  • How do infertility clinics assist couples?
  • What is the role of ART?

Assisted Reproductive Technologies

Key Techniques

  • Test tube baby programme (IVF + embryo transfer).
  • Gamete intra fallopian transfer (GIFT).
  • Intra cytoplasmic sperm injection (ICSI).
  • Artificial insemination (AI) including intrauterine insemination (IUI).

Memory Aids

  • IVF = Fertilisation outside body + embryo transfer.
  • GIFT = Sperm + ovum placed in fallopian tube.
  • ICSI = Sperm injected into ovum cytoplasm.
  • AI = Semen introduced artificially into female tract.

Quick Checkpoints

  • What is IVF and how does it work?
  • When is GIFT used?
  • Describe ICSI technique.
  • What conditions require AI?

Test Tube Baby Programme

Process

  • Ova and sperm collected from wife/husband or donors.
  • Fertilisation occurs outside body (in vitro fertilisation).
  • Embryo transfer:
    • Up to 8 blastomeres: transferred to fallopian tube (ZIFT).
    • More than 8 blastomeres: transferred to uterus (IUT).
  • Embryo can be implanted in another female (surrogate mother).
Uploaded image analysis

Memory Aids

  • IVF = Fertilisation outside body.
  • ZIFT = Zygote transferred to fallopian tube.
  • IUT = Embryo transferred to uterus.
  • Surrogate mother = Female who carries embryo for another.

Quick Checkpoints

  • What is the difference between ZIFT and IUT?
  • Who is a surrogate mother?
  • What Nobel Prize was awarded related to IVF?

Gamete Intra Fallopian Transfer

Technique

  • Used when female cannot produce ova but can support embryo development.
  • Sperm and ovum from donor introduced into fallopian tube of recipient female.

Memory Aids

  • GIFT = Gametes placed directly in fallopian tube.

Quick Checkpoints

  • When is GIFT preferred over IVF?
  • What gametes are used in GIFT?

Intra Cytoplasmic Sperm Injection

Technique

  • Sperm directly injected into ovum cytoplasm in lab.
  • Embryo transferred by ZIFT or IUT into female.

Memory Aids

  • ICSI = Direct sperm injection into ovum.

Quick Checkpoints

  • How does ICSI differ from IVF?
  • What happens after sperm injection in ICSI?

Artificial Insemination

Technique

  • Used when husband cannot inseminate or has low sperm count.
  • Semen from husband or donor introduced into vagina or uterus (IUI).

Memory Aids

  • AI = Artificial introduction of semen.
  • IUI = Intrauterine insemination.

Quick Checkpoints

  • When is AI recommended?
  • What is IUI?

Detection of Fetal Disorders

Techniques

  • Amniocentesis: Fluid from amniotic sac tested for chromosomal disorders and fetal sex.
  • Chorionic Villi Sampling (CVS): Fetal tissue from placenta used for karyotyping.
  • Ultrasound imaging: Non-invasive fetal condition assessment.
  • Fetoscopy: Direct viewing of fetus using a thin tube inserted into uterus.

Memory Aids

  • Amniocentesis = Amniotic fluid test.
  • CVS = Placental tissue test.
  • Ultrasound = Non-invasive imaging.
  • Fetoscopy = Direct fetal view.

Quick Checkpoints

  • What is the purpose of amniocentesis?
  • How is CVS performed?
  • Which technique is non-invasive?
  • What does fetoscopy allow?

NEET Zoology — ALL CHAPTERS

1

Structural Organisation in Animals

2

Breathing and Exchange of Gases

3

Body Fluids and Circulation

4

Excretory Products and their Elimination

5

Locomotion and Movement

6

Neural Control and Coordination

7

Human Reproduction

8

Reproductive Health

9

Evolution

10

Microbes in Human Welfare

11

Organism and Population

12

Ecosystem

13

Biodiversity and Conservation