Period refers to menstruation. For a woman with a regular menstrual cycle, the day of ovulation is 14 days before the next menstrual period on May 29th, i.e. around June 12th. If a woman’s menstrual cycle is more regular, with a menstrual cycle of about 28 days, the day of ovulation is usually about 14 days before the next menstrual period. for a woman who has her period on May 29, the next menstrual period usually comes on about June 26, and the 14 days before the period would be about June 12th. If a woman’s menstrual cycle is longer or shorter, the method of calculating the day of ovulation should be adjusted appropriately. If a woman’s menstrual cycle is not regular, there is no way to calculate the day of ovulation. If you are planning to get pregnant, you can have intercourse on the day of ovulation as well as in the days before and after the day of ovulation to make it easier to conceive.