Which of the following approaches does not give the defined action of contraceptive ?
- Intra uterine devices Increase phagocytosis of sperms, suppress sperm motility and fertilizing capacity of sperm
- Barrier methods Prevent fertilization
- Hormonal contraceptives Prevent/retard entry of sperm, prevent ovulation and fertilization
- Vasectomy Prevents spermatogenesis
Answer
(4) Vasectomy Prevents spermatogenesis
Solution
As per NCERT, in vasectomy a small part of the vas deferens is removed or tied up through a small incision on the scrotum.
⇒ This blocks gamete transport; spermatogenesis in the testes continues.
∴ "Vasectomy Prevents spermatogenesis" is the wrong action.
The actions given for IUDs, barrier methods and hormonal contraceptives are as stated in NCERT.
Answer: (4)