Question

Given below are four methods (A-D) and their modes of action (a-d) in achieving contraception. Select their correct matching from the four options that follow:

| List 1| | List 2
---|---|---|---
A| the pill| 1| prevents sperms reaching cervix
B| Condom| 2| prevents implantation
C| Vasectomy| 3| prevents ovulation
D| copper T| 4| semen contains no sperm

a. A-3, B-1, C-4, D-2
b. A-1, B-3. C-4, D-2
c. A-1, B-3, C-2, D-4
d. A-1, B-4, C-3, D-2

Answer 1

Differentiate the options into physical and chemical barriers. Physical barriers stop the sperm from entering the cervix whereas chemical methods stop either ovulation or implantation.

Complete answer:
There are total two types of barriers which help in the prevention of pregnancy, they are physical barrier requiring the use of physical methods and no problems or side effects are caused to the body; the other being the chemical barriers including the use of medicines and other contraceptive devices but they are supposed to have other side effect also.

The contraceptive pills are of various types which either stops the endometrial lining from developing and thus somehow preventing the attachment of the zygote or they can prevent the process of ovulation because if ovulation didn’t happen then there are no chances of fertilization and the contraception can be achieved. But these pills sometimes produce health related side effects to the body.

Condom is a type of physical barrier which is used over the penis and is used to collect all the semen ejaculated and stops the semen from entering the vagina and preventing pregnancy.

Vasectomy is a permanent method in which the vasa deferens is cut and stitched so that the semen does not reach the urethra and thus during ejaculation other fluids are transferred except for the sperm which is important for pregnancy.

Copper T – it is a chemical method in which a small t shaped object made up of copper is placed in the vagina of the female, thus copper T reacts with the other fluids present in there and the whenever embryo tries to get implanted, it gets shredded off due to chemical abnormalities caused by the copper T.

Hence, the correct answer is option (A).

Additional information:
The copper t is not a permanent type of contraception like the vasectomy where vasa deferens is cut off. The copper t can be removed from the vagina whenever the person wants.

Note: As vasectomy is a technique of permanent sterilization in males, tubectomy is a method inducing permanent sterilization in females.
- In tubectomy, fallopian tubes are blocked so that the eggs cannot travel to the uterus.
- Some of the side effects of contraceptive pills are- irregular menstrual bleeding, nausea, mood changes, breast tenderness, etc.
- Condoms can lead to rashes or hives.