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(a) Write the function of the placenta in females.(b) List four ways of preventing pregnancy. State two advantages of using such preventive methods.
(a) Placenta's main function is to exchange nutrients, oxygen and waste product between an embryo and mother.
(b) The different methods of contraception are as follows:
1. Natural method: It is the method of avoiding the chances of fertilization.
2. Barrier method: For example, Condoms.
3. Oral contraceptives: Tablets are taken orally which has small doses of hormones.
4. Implants and surgical methods: It includes the use of contraceptive devices such as the loop or Copper-T.
(i) It prevents the fertilization of egg and sperm, thereby avoiding the chances of getting unwanted pregnancy.
(ii) Using barrier methods like condom protects the persons involved in a sexual relationship from sexually transmitted diseases.
Updated on: 20-Mar-2023
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