Which among the following is barrier method of contraceptive?

None of these.

The correct answer is Option (4) -None of these.

Natural methods work on the principle of avoiding chances of ovum and sperms meeting.

Periodic abstinence is one such method in which the couples avoid or abstain from coitus from day 10 to 17 of the menstrual cycle when ovulation could be expected. As chances of fertilisation are very high during this period, it is called the fertile period. Therefore, by abstaining from coitus during this period, conception could be prevented.

Withdrawal or coitus interruptus is another method in which the male partner withdraws his penis from the vagina just before ejaculation so as to avoid insemination.

Lactational amenorrhea (absence of menstruation) method is based on the fact that ovulation and therefore the cycle do not occur during the period of intense lactation following parturition. Therefore, as long as the mother breast-feeds the child fully, chances of conception are almost nil.

In barrier methods, ovum and sperms are prevented from physically meeting with the help of barriers. Such
methods are available for both males and females.