Which of the following contraception approaches is not matched to their correct action?

Barrier methods - Prevent fertilisation

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Intra uterine devices - Increase phagocytosis of sperm, suppress sperm motility and fertilising capacity of sperm

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Hormonal contraceptives - Prevent/retard entry of sperm, prevent ovulation and fertilisation

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Vasectomy - Prevents spermatogenesis

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Solution

The correct option is D Vasectomy - Prevents spermatogenesis
Contraception does not mean prevention of spermatogenesis or oogenesis. The gametes will be produced by the sex organs. But other aspects like a release of the ovum, entry of sperms into the vagina, travelling of sperm through fallopian tube or implantation of the zygote, etc. are prevented in order to avoid pregnancy. Vasectomy does not prevent spermatogenesis, but just prevents the entry of sperm into semen.

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Q. Name the methods which can prevent contraception in the following ways:
a) Prevent implantation
b) Prevent fusion of gametes
c) Increase phagocytosis of sperms [3]

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\begin{matrix} M e t h o d & M o d e o f a c t i o n A . T h e p i l l & (i) P r e v e n t s s p e r m s r e a c h i n g c e r v i x B . C o n d o m & (i i) P r e v e n t s i m p l a n t a t i o n C . V a s e c t o m y & (i i i) P r e v e n t s o v u l a t i o n D . C o p p e r - T & (i v) S e m e n c o n t a i n s n o s p e r m s \end{matrix}

Q. CuTis an effective method of contraception which is achieved by
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(B) preventing ovulation
(C) preventing the entry of sperms into cervix
(D) none of these

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\begin{matrix} M e t h o d & M o d e o f A c t i o n (1) & T h e p i l l & P r e v e n t s s p e r m s r e a c h i n g c e r v i x (2) & C o n d o m & P r e v e n t s i m p l a n t a t i o n (3) & V a s e c t o m y & P r e v e n t s o v u l a t i o n (4) & C o p p e r - T & S e m e n c o n t a i n s n o s p e r m s \end{matrix}

Given below are four methods (A-D) and their modes of action (i) - (iv) in achieving contraception. Select their correct matching from the four options which follow.

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