I have my period on the 18th, how to calculate ovulation?

Female ovulation = number of days in menstrual cycle – 18 days

For example, if your menstrual cycle is 28 days, your ovulation period is:

Female ovulation period = 28 days - 18 days = 10 days

Therefore, if you have your period on the 18th, your ovulation period is around the 10th of each year.

In addition to using a formula to calculate ovulation, you can also watch yourself for symptoms such as breast engorgement, nausea, headaches, and increased flow. These symptoms usually appear around the time of ovulation.

A woman's menstrual cycle is affected by many factors, such as climate, stress, diet, and medications. Therefore, if your cycles are erratic, you may need to follow the advice of your doctor or professional to determine when you are ovulating.

Overall, understanding your menstrual cycle and ovulation is important for planning pregnancy and staying healthy. If you have any questions, please consult your doctor or professional.