What is the work of progesterone which is present in oral contraceptive pills:
- To check entry of sperms into cervix & to make them inactive
- To check sexual behaviour
- To check oogenesis
- To inhibit ovulation
Answer
(4) To inhibit ovulation
Solution
As per NCERT, oral pills contain progestogens alone or a progestogen–estrogen combination.
Their main action is to inhibit ovulation (they suppress the LH surge needed for release of the ovum); they also inhibit implantation and alter the quality of cervical mucus to prevent or retard the entry of sperms.
∴ The main work of the progesterone in the pill is to inhibit ovulation.
Answer: (4)