Name two hormones that are constituents of contraceptive pills. Why do they have high and effective contraceptive value ? Name a commonly prescribed non-steroidal oral pill.

Two hormones that are constituents of contraceptive pills are
i. Progesterone
ii. Estrogen.

They have a high and effective contraceptive value as they inhibit ovulation and implantation as well as after the quality of cervical mucus to prevent / retard entry of sperm and have very few side effects . 

Saheli - is an example of non-steroidal pill.