Which of the following can be used by females as injections or implanted under their skin?

Which of the following is a non-steroidal oral contraceptive pill taken once a week?

Which of the following is not a natural/traditional contraceptive method?

$Norplant$ is a new form of birth control,and it:

Diaphragms are contraceptive devices used by females. Choose the correct option from the statements given below:
$i$. They are introduced into the uterus
$ii$. They are placed to cover the cervical region
$iii$. They act as physical barriers for sperm entry
$iv$. They act as spermicidal agents

Periodic abstinence is a method of birth control that involves avoiding sexual intercourse during which phase?