Hello dear student, 

Greetings! 

Natural method of birth control or contraception includes following method:-

Periodic abstinence-

1. In this method, couples avoid coitus from day 10 to 17 of the menstrual cycle when ovulation could be expected.
2. This period is also called as fertile period as the chances of fertilization is very high during this period.

Withdrawal or coitus interruptus- In the method, the male partner withdraws the penis from the vagina just before ejaculation to avoid insemination.

Lactational amenorrhea-

1. The menstrual cycle and ovulation do not occur during intense lactation and so the chances of pregnancy are low.
2. This method is effective only upto six months after child birth.
3. thankyou