Class 12th Biology 2018 Set1 Delhi Board Paper Solution
How can the scientific understanding of the menstrual cycle of human females help as a contraceptive measure?
Natural method works on the principle of avoiding chances of ovum and sperms meeting. Periodic abstinence is one such method in which the couples avoid on abstain from sexual intercourse from day 10 to 17 to the mentrual cycle, when ovulation could be expected. As chances of fertilization are very high during this period, which is known as the fertile period. Therefore, by abstaining from coitus during the period, the action of conceiving a child could be prevented. So we can say that human female's mentrual period helps as the contraceptive measures.
There are several other methods like the chemical methods which prevents the fertilization during the intercourse: Intrauterine Devices (IUDs), Diaphragm, Condoms, Vault cap etc.
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