Question
Biology Question on Population Stabilisation And Birth Control
The most important component of the oral contraceptive pills is
A
thyroxine
B
luteinizing hormone
C
progesterone
D
growth hormone.
Answer
progesterone
Explanation
Solution
Oral contraceptive pills contain either progesterone only or a combination of progesterone and estrogen. These pills act in four ways:
(i) Inhibition of ovulation.
(ii) Inhibition of motility and secretory activity of oviducts (Fallopian tubes).
(iii) Changes in cervical mucus impairing its ability to allow passage and transport of sperms.
(iv) Alteration in uterine endometrium to make it unsuitable for implantation.