Explain the following terms: i) Periodic abstinence ii) Coitus interruptus


i) Periodic abstinence
This is natural method of birth control. In this the couples avoid sex from 10 to 17 day of the menstrual cycle because ovulation can occur during his period usually around 14th day. The chances of fertilisation are very high during this phase.

ii) Coitus interruptus
This is also a natural method of birth control. In this male withdraws his penis from vagina before ejaculation to avoid insemination.

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