What is the primary function of $Cu$ ions released by $IUDs$?

Choose the correct option which can be used by females as injections or implants under the skin for contraception from the following:
$(i)$ Progestogens
(ii) Progestogen + estrogen combinations
(iii) Estrogen
(iv) Progestasert

What does the given figure represent?

Oral contraceptive pills are taken daily for a period of $...$ days. After a gap of $...$ days,this process is repeated until the woman desires to prevent conception.

Describe the location and function of Diaphragms and Foams in the context of reproductive health.

Which oral contraceptive is developed by $CDRI$?