Question

Given are four methods $(1-4)$ and their modes of action (a-d) in achieving contraception. Select their correct matching from the four options that follows.

Method	Mode of Action
$\left(1\right)$ The pill	(a) Prevents sperms reaching cervix
$\left(2\right)$ Condom	(b) Prevents implantation
$\left(3\right)$ Vasectomy	(c) Prevents ovulation
$\left(4\right)$ LNG-$20$	(d) Semen contains no sperms

Answer 1

1. The oral contraceptive pills contain synthetic estrogens and progestrones that prevent normal menstrual cycle, primarily preventing ovulation.

2. Condoms are thin rubber sheath on erect penis that collect ejaculated semen and hence prevent them from reaching cervix.

3. In vsectomy, man’s vasa deferentia are cut and tied permanently blocking sperm passage, hence no sperms are found in semen.

4. LNG-20 is an intra-uterine device (IUD) placed in the uterus to prevent implantation.