Progestasert is an $IUD$ which makes the uterus unsuitable and cervix hostile to the sperms as they are:

Surgical removal or cutting and ligation of the ends of the oviduct is known as

Which of the following contraceptive methods can be used by both males and females?

Choose the correct option for $A, B, C$ and $D$.

What is the purpose of contraceptive pills?
$I$. They inhibit ovulation and implantation
$II$. They alter the quality of cervical mucous to prevent or retard the entry of sperms
$III$. They prevent the ejaculated semen from entering the female vagina
$IV$. They inhibit spermatogenesis

Which of the following is an incorrect statement for periodic abstinence?