10.4 When menstruation occurs, when is ovulation?

Generally speaking, a woman's menstrual cycle lasts 28 days, but it varies from person to person. Some women may have their menstrual cycle a few days earlier or later, which is normal. If your menstrual cycle is 28 days, starting on 10.4, your next menstrual cycle will be approximately 11.21 days.

A woman's menstrual cycle and ovulation period are affected by many factors, such as diet, stress, medications, diseases, etc. Therefore, it is not easy to accurately predict a woman's menstrual cycle and ovulation.

If you want to know when you are ovulating, you can calculate it by:

1. Measure basal body temperature: Women can measure their body temperature when they wake up every morning and record changes in body temperature. Generally speaking, during the ovulation period of a woman's menstrual cycle, the body temperature will rise by about 0.3-0.5 degrees Celsius.

2. Observe symptoms: Some women may experience symptoms during the ovulation period of the menstrual cycle, such as changes in appetite, breast swelling, nausea, headaches, etc. If you have these symptoms, you may be ovulating at the end of your cycle.

3. Use David test strips: David test strips are a common method for measuring a woman’s menstrual cycle and ovulation. It tests the presence of pregnancy hormones in a woman's urine and shows the result whether she is pregnant or not.

In short, although it is impossible to accurately predict women's menstrual cycles and ovulation periods, the above methods can help women better understand their body changes and thus better grasp their menstrual cycles. If you are experiencing symptoms at the end of your cycle, you can increase your physical activity to promote good health and a regular menstrual cycle.