Heather is using the calendar method of birth control and has a regular 28-day cycle. If she wishes to avoid pregnancy, on which days of her cycle should she avoid intercourse (with the first day of her menstrual period being day 1)?

Question

Quizplus · Accepted Answer

The calendar method of birth control identifies days 8 through 19 as the fertile window in a regular 28-day cycle, during which intercourse should be avoided to prevent pregnancy. This is based on the lifespan of sperm (up to 5 days) and the ovulation period (around day 14), making this time frame the most risky for conception.

Heather Is Using the Calendar Method of Birth Control and Has