Natural methods for contraception work on the principle of:

1. Preventing fertilization

2. Preventing implantation

3. Preventing ovulation

4. Preventing embryo development

Which of the following is the least effective method of birth control?

1. vasectomy

2. rhythm method

3. the pill

4. IUD

Periodic abstinence is a natural method of contraception where the couples avoid or abstain from coitus during the period of the menstrual cycle when:

1. There is menstrual flow

2. The ovulation is most likely to occur

3. The corpus luteum is most active

4. The proliferative phase begins

What is true for an ideal contraceptive?

I. It should be user-friendly

II. It should be easily available

III. It should be ineffective and reversible with least side effects

IV. It should be effective and reversible with least side effects.

V. It should interfere with the sexual act of the user

1. All of the above

2. I, II, III

3. I, II, IV

4. I, II, IV, V

What is true of natural methods of contraception?

1. They increase phagocytosis of sperms

2. They employ barriers to prevent fertilization

3. They are natural ways of avoiding chances of fertilization

4. They are surgical methods and are terminal methods