CBSE · NCERT · Class 12 Biology · Chapter 3

NCERT Solutions: Class 12 Biology Chapter 3 - Reproductive Health

12 textbook Q&A12 verifiedFree Content

Chapter-wise NCERT intext questions and exercise answers for Reproductive Health, grounded in the official textbook.

Questions are taken verbatim from the NCERT textbook; answers were grounded against the chapter's content during generation. Items needing review are marked.
Sections in this chapter
Exercises 12
Your Progress - Chapter 30% complete
1Exercises12 questions
Q.1What do you think is the significance of reproductive health in a society?v
Solution

A reproductively healthy society has informed people, safe reproductive practices, proper care during pregnancy and childbirth, prevention and treatment of STIs, and support for infertility. This reduces maternal and infant mortality, prevents reproductive illnesses and helps control population growth responsibly.

Answer:

Reproductive health is significant because it supports physical, emotional, behavioural and social well-being in all aspects of reproduction and helps build healthy families and a responsible society.

Q.2Suggest the aspects of reproductive health which need to be given special attention in the present scenario.v
Solution

The chapter highlights awareness about reproductive organs, adolescence, safe and hygienic sexual practices, STIs including AIDS, birth control, care of pregnant mothers, post-natal care, breast feeding, equal opportunities for female and male children, and legal checks on misuse of amniocentesis.

Answer:

Special attention should be given to sex education, contraception, maternal and child care, prevention and treatment of STIs, safe MTP, infertility care, and prevention of sex-related crimes and female foeticide.

Q.3Is sex education necessary in schools? Why?v
Solution

NCERT states that introducing sex education in schools should be encouraged so that young people do not rely on myths. Accurate information helps adolescents make responsible choices, maintain hygiene, avoid unsafe practices and prevent STIs and unwanted pregnancy.

Answer:

Yes. Sex education is necessary because it gives correct information about reproductive organs, adolescence, safe sexual practices, STIs and AIDS, and removes myths and misconceptions.

Q.4Do you think that reproductive health in our country has improved in the past 50 years? If yes, mention some such areas of improvement.v
Solution

The chapter notes that RCH programmes increased awareness and medical support. Indicators of improvement include decreased MMR and IMR, increased medically assisted deliveries, better post-natal care, more couples adopting small families, and better detection and cure of STIs.

Answer:

Yes. Improvement is shown by better awareness, more medically assisted deliveries, better post-natal care, reduced maternal and infant mortality, small-family acceptance, improved STI detection and treatment, and wider medical facilities.

Q.5What are the suggested reasons for population explosion?v
Solution

Better health facilities and living conditions increased survival. When deaths, maternal deaths and infant deaths fall while many people are in reproductive age, the population growth rate rises sharply.

Answer:

Population explosion is mainly due to a rapid decline in death rate, maternal mortality rate and infant mortality rate, along with an increase in the number of people in reproductive age.

Q.6Is the use of contraceptives justified? Give reasons.v
Solution

Contraceptives are not required for normal reproductive health, but they are useful when couples need to avoid, delay or space pregnancy for personal and social reasons. They also reduce the burden of population explosion. Their selection should be made with medical advice because side effects and suitability vary.

Answer:

Yes, contraceptive use is justified when used responsibly to prevent unwanted pregnancy, delay or space pregnancies, and help control unchecked population growth.

Q.7Removal of gonads cannot be considered as a contraceptive option. Why?v
Solution

Contraception should prevent pregnancy without damaging normal body functions. Surgical contraception such as vasectomy or tubectomy blocks gamete transport; it does not remove testes or ovaries. Removing gonads would be castration or ovariectomy, causing severe and irreversible effects.

Answer:

Removal of gonads is not a contraceptive option because it destroys gamete and hormone production and causes permanent loss of reproductive and endocrine functions.

Q.8Amniocentesis for sex determination is banned in our country. Is this ban necessary? Comment.v
Solution

Amniocentesis can be used medically to detect genetic disorders, but using it to identify foetal sex encourages illegal sex-selective abortion. The chapter specifically mentions statutory ban on amniocentesis for sex determination to check the menace of female foeticide.

Answer:

Yes. The ban is necessary because misuse of amniocentesis for sex determination can lead to female foeticide.

Q.9Suggest some methods to assist infertile couples to have children.v
Solution

In IVF-ET, ova and sperms are collected and fertilised in laboratory conditions. A zygote or embryo up to 8 blastomeres may be transferred into the fallopian tube as ZIFT, while embryos with more than 8 blastomeres are transferred into the uterus as IUT. In GIFT, a donor ovum is transferred into the fallopian tube. In ICSI, sperm is directly injected into an ovum. In AI or IUI, semen from the husband or donor is introduced into the vagina or uterus. Adoption is also a legal and humane option.

Answer:

Infertile couples can be assisted by IVF followed by embryo transfer, ZIFT, IUT, GIFT, ICSI, artificial insemination or intra-uterine insemination, and legal adoption.

Q.10What are the measures one has to take to prevent from contracting STDs?v
Solution

The chapter lists these preventive principles for STIs: avoid unknown or multiple sexual partners, use condoms, and seek qualified medical care for detection and treatment. These measures reduce transmission and prevent complications.

Answer:

One should avoid sex with unknown or multiple partners, use condoms during coitus, and consult a qualified doctor for early detection and complete treatment if infection is suspected.

Q.11State True/False with explanation (a) Abortions could happen spontaneously too. (True/False) (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) (c) Complete lactation could help as a natural method of contraception. (True/False) (d) Creating awareness about sex related aspects is an effective method to improve reproductive health of the people. (True/False)v
Solution

(a) Spontaneous abortion can occur naturally without medical intervention. (b) Infertility means inability to produce children despite unprotected sexual cohabitation; it may be due to male or female factors, and the chapter notes that the problem often lies in the male partner. (c) Lactational amenorrhea can prevent ovulation during intense breast-feeding, but is effective only up to about six months after parturition. (d) Awareness about sex-related aspects is a primary step in improving reproductive health.

Answer:

(a) True. (b) False. (c) True. (d) True.

Q.12Correct the following statements : (a) Surgical methods of contraception prevent gamete formation. (b) All sexually transmitted diseases are completely curable. (c) Oral pills are very popular contraceptives among the rural women. (d) In E. T. techniques, embryos are always transferred into the uterus.v
Solution

Vasectomy and tubectomy block transport of sperms or ova; they do not stop gamete formation. Except hepatitis-B, genital herpes and HIV infections, other listed STIs are completely curable if detected early and treated properly. Oral pills require correct use and awareness. In embryo transfer, zygote or embryos up to 8 blastomeres are transferred into the fallopian tube as ZIFT, while embryos with more than 8 blastomeres are transferred into the uterus as IUT.

Answer:

(a) Surgical methods prevent gamete transport. (b) Not all STIs are completely curable. (c) Oral pills are well accepted by females, especially where access and awareness are adequate; the chapter does not state that they are very popular among rural women. (d) In ET techniques, embryos may be transferred into the fallopian tube or the uterus depending on their stage.