Progestogens alone or in combination with estrogens can be used as a contraceptive in the form of

Contraceptive method,having least side effect is $:-$

In male sterilization,$A$ is cut and tied. This process is called $B$. Fill in the correct option for $A$ and $B$.

Which of the following side effects can occur due to the excessive use of contraceptive methods?

Which of the following have been found to be very effective as emergency contraceptives,as they could be used to avoid possible pregnancy due to rape or casual unprotected intercourse if administered within $72$ hours?
$A.$ Administration of progestogens
$B.$ Progestogen-estrogen combinations
$C.$ $IUDs$ inserted within $72$ hours of coitus

In lactational amenorrhoea,there is no ovulation or menstruation during the period of intense lactation following parturition,due to high levels of prolactin,which: