Give scientific reasons : Pills taken orally prevents pregnancy.
These pills contain combination of progesterone - estrogen. These pills are taken from 5th day of menstrual cycle. The process of ovulation starts after menstruation flow. The effect of these pills stops ovulation. The mucus layer of cervix becomes thick. Mucus layer of cervix becomes inactive. The entry of sperms is prevented. This way the process of fertilization is obstructed and pregnancy doesn't take place.
The diaphragm is a rubber dome shaped structure and stops the sperms from entering into
$A$ : ‘Saheli’-new oral contraceptive for the females was developed at $CDRI$, Lucknow.
$R$ : It has no steroid in it
Daily oral contraceptive pill is
Choose correct pair.
Ideal contraceptive should be
$I$. User-friendly
$II$. Easily available
$III$. Effective
$IV$. Interferring coitus
$V$. Expensive and effective