My period ends on the 18th, when is ovulation?

To determine when ovulation occurs, we need to know a woman's menstrual cycle and lunar movement cycle. Typically, there is a correlation between a woman's lunar movement cycle and her menstrual cycle. Therefore, we can use the following formula to determine a woman’s ovulation period:

Female ovulation period = lunar cycle + 14 days

For example, if a woman's lunar cycle is 29 days, her menstrual cycle is 30 days. If her period ends on the 18th, she is safe for the next 14 days. Therefore, the 14-day period from the end of your period on the 18th to the end of your period on the 18th of the next month is safe.

However, this is only a rough guide. Because lunar movement and hormone levels are affected by many factors, a woman's menstrual and lunar movement cycles may differ. Therefore, if you are unsure about your cycle, it is best to consult a doctor or professional advisor.

Generally speaking, when menstruation ends on the 18th, which day is the ovulation period is a relatively simple question, but factors such as the woman's lunar movement cycle and hormonal levels need to be taken into consideration. If you are unsure, it is best to consult a doctor or professional advisor.