a. Periodic abstinence: Couple avoid or abstain from coitus from days 10-17 of the menstrual cycle when ovulation is expected as the period is very fertile for conception.
b. Withdrawal or Coitus interruptus: The male partner withdraws his ***** from the ****** just before the ejaculation of the semen to avoid insemination.
c. Lactational amenorrhoea: During lactational period, after parturition, there would be a period where no ovulation occurs and hence no menstruation. Such a period is called lactational amenorrhea and is considered to be a safe period.