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Biology · 2025 · 3 marks
CBSE 2025 · Region 7 · Set 1 · Q22
A village health worker was taking a session with women. She tells them that one has to be careful while using oral pills as a method of birth…
A village health worker was taking a session with women. She tells them that one has to be careful while using oral pills as a method of birth control. Wrong usage can actually promote conception.
(a)
Analyse the above statement and compare the merits and demerits of using oral pills and surgical methods of birth control.
(b)
Village women are confused as to how a thin metallic copper loop can provide protection against pregnancy. Explain the mode of action of IUDs. Give two points.
Marking-scheme solution
(a)
Oral Pills
Merits – Effective with less side effects/reversible/ cost effective/ user friendly.
Demerits – Have side effects when taken for a long time/ Pills if not taken and not repeated in a particular pattern may fail to prevent conception/wrong usage may promote conception
Surgical Method :
Merits – Highly effective / Block gamete transport
Demerits – Not reversible / Can affect health if not performed in hygienic conditions.
(b)
IUD’s prevent conception by
-Increase phagocytosis of sperms.
-Some suppress sperm motility and fertilizing capacity of sperms by releasing
Cu++ ions.
Hormone releasing IUD’s make uterus unsuitable for implantation and
cervix hostile to sperms.
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