Is the ovulation day only one day?

Patient's question:

No

Doctor's answer:

Yes, for women with a regular menstrual cycle, you calculate when your next period will come. Subtract 14 days from the first day of the next period. This day is the ovulation day. If a woman's menstrual cycle is 28 days, her ovulation day should be around the 14th day of the cycle. If a woman's menstrual cycle is 40 days, her ovulation day should be around the 26th day of the cycle (approximately 14 days before the next period).