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प्रश्न
List and explain in brief three methods of contraception.
उत्तर
Contraceptive methods are used to avoid pregnancy. The three methods are
(i) Mechanical barrier: Condoms on the penis or similar coverings worn in the vagina can serve this purpose. These barriers do not allow sperms to reach the egg.
(ii) Use of contraceptive pills: The contraceptive pills prevent the release of and fertilisation cannot occur.
(iii) Contraceptive devices: In this method, loop or the copper-T are placed in the uterus to prevent pregnancy.
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संबंधित प्रश्न
What is placenta?
Write the functions of the following parts in human female reproductive system:-
(i) Ovary
(ii) Oviduct
(iii) Uterus
State the changes that take place in the uterus when Implantation of embryo has occurred
State the changes that take place in the uterus when Female gamete/egg is not fertilised
Give scientific reasons: Mature erythrocytes in humans lack nucleus and mitochondria
Name the liquid that contains sperms.
Describe the process of fertilisation in humans and development of embryo briefly.
What is placenta? What is its function?
Differentiate
Sexual Reproduction and Asexual Reproduction.