Periodic abstinence: Also known as fertility awareness, natural family planning, and the rhythm method, this approach entails not having sexual intercourse on the days of a woman's menstrual cycle when she could become pregnant or using a barrier method (such as a condom, the diaphragm or a cervical cap) for birth.

Periodic abstinence is a method in which couples avoid coitus during specific times in a woman's menstrual cycle. The correct answer is option 'B', which suggests avoiding intercourse from day 10 to 17 of the menstrual cycle.


Periodic abstinence, also known as the rhythm method or natural family planning, is a contraceptive method that relies on identifying the fertile period of a woman's menstrual cycle to avoid pregnancy. It involves tracking menstrual cycles and abstaining from sexual intercourse during the woman's most fertile days.


The menstrual cycle consists of various phases, including the follicular phase, ovulation, and the luteal phase. Ovulation is the process in which a mature egg is released from the ovary and is available for fertilization. This occurs approximately midway through the menstrual cycle, around day 14 in a 28-day cycle.


To determine the fertile period, couples can track the woman's menstrual cycle over several months. By keeping a record of the start and end dates of each menstrual period, they can identify patterns and estimate the fertile window.


Option 'B' suggests avoiding coitus from day 10 to 17 of the menstrual cycle. This range is chosen because it covers the days leading up to and immediately after ovulation. Sperm can survive in the female reproductive tract for up to 5 days, while the egg is viable for about 24 hours after ovulation. By avoiding intercourse during these days, the chances of fertilization are significantly reduced.


Periodic abstinence can be an effective method of contraception when followed correctly. However, it is important to note that it requires a high level of commitment, discipline, and accurate tracking of menstrual cycles. Additionally, this method does not protect against sexually transmitted infections (STIs).


Periodic abstinence, or the rhythm method, is a contraceptive approach that involves avoiding coitus during the fertile period of a woman's menstrual cycle. Option 'B' suggests avoiding intercourse from day 10 to 17 of the menstrual cycle, which covers the days surrounding ovulation. This method can be effective when followed diligently, but it may not be suitable for everyone and does not protect against STIs.

Day 10-17 is risk period.
refer NCERT pg59 (class12)