Question

Which of the Following approaches does not give a defined action of contraceptive?
A. Vasectomy Prevent Spermatogenesis
B. Barrier method prevent fertilization
C. Intrauterine device increases phagocytosis of sperms , suppresses sperm motility and fertilization capacity of the sperm
D. Hormonal contraceptives prevent retard entry of the sperm , prevent ovulation

Answer 1

Hint: Contraceptives are the devices/chemical which prevent the pregnancy. Ideal Contraceptive should have least side effect and should not interfere much with reproductive physiology.

Complete step by step answer:
Vasectomy (Vasa- Vas deferens and tomy- to cut) is the surgical or Terminal contraceptive method in male. In this method a small incision is made in the scrotum, vas deferens is cut and tied. This blocks the pathway of the sperm beyond vas deferens. Vasectomy does not interfere with the sperm production as well as sex hormone production but simply bock the path of the sperm so that the formed sperm can’t be ejected out. Because of this vasectomy has least side effect and also does not affect libido (sexual desire). Male can produce semen but semen will be without sperm. Since semen will have no sperm fertilization chances is almost nil. Vasectomy can be performed only when a couple don’t need any child in future as the reversibility of this method is very poor.
Barrier methods such as condoms and Diaphragm act as physical barriers to prevent meeting of sperm and ovum. Contraceptive pills mostly have progesterone, progesterone prevent ovulation and make the cervix mucus thick thick mucus spread around the endometrium and make it unsuitable for implantation thick mucous form a plug and block the entry of sperm. IUD can have copper which is toxic to the sperm and it reduces sperm motility.

Thus the correct answer is a. Vasectomy prevents spermatogenesis.

Additional information: Similar to vasectomy in female tubectomy is done in which the fallopian tube is cut and tied. Ovulation takes place normally but since the path is blocked sperm and ovum can’t meet with each other and fertilization can’t occur.

Note:
Vasectomy and Tubectomy are called terminal or permanent contraceptive methods as once it is done it can’t be reversed, while the rest of the contraceptives are temporary. Thus such methods can be opted only when no further pregnancy is required.