Emergency contraceptives are effective if used within:

Contraceptive pills contain ......... .

$A$: Both vasectomy and tubectomy are very effective,as the failure rate of such surgical approaches is almost zero percent.
$R$: Reversibility is poor.

Which of the following statement$(s)$ is/are correct about diaphragms, cervical caps, and vaults?
$A$. These are barrier methods of contraception.
$B$. They are designed to cover the cervix during coitus to prevent the entry of sperm.
$C$. They provide protection against sexually transmitted diseases $(STDs)$.
$D$. These devices are made of rubber and are reusable.

Oral contraceptives prevent:

Female condoms are known as: