Match List - I with List - II with respect to methods of Contraception and their respective actions.

	List - I		List - II
(a)	Diaphragms	(i)	Inhibit ovulation and Implantation
(b)	Contraceptive Pills	(ii)	Increase phagocytosis of sperm within the Uterus
(c)	Intra Uterine Devices	(iii)	Absence of Menstrual cycle and ovulation following parturition
(d)	Lactational Amenorrhea	(iv)	They cover the cervix blocking the entry of sperms

Choose the correct answer from the options given below:

Concept:  

• There are various different methods that can be used in birth control. These are called contraceptive methods.
• It helps to prevent unwanted pregnancies.
• Contraceptive methods are broadly grouped into the following categories, namely Natural/Traditional, Barrier, IUDs, Oral contraceptives, Injectables, Implants, and Surgical methods.

Explanation:

• Diaphragms are barrier methods of contraception. They cover the cervix and block the entry of sperm.
• Contraceptive pills are preparations containing either progestogens alone or a combination of progestogen and estrogen. They inhibit ovulation and implantation as well as alter the quality of cervical mucus to prevent the entry of sperms.
• Intrauterine devices increase the phagocytosis of sperms within the uterus.
• Lactational amenorrhea is a natural method of contraception and it is based on the fact that ovulation and therefore menstrual cycle do not occur during the period of intense lactation following parturition.
• Therefore, the correct answer is option 3.

Additional Information

• It is to be noted that IUDs are one of the most widely accepted methods of contraception in India.