How to calculate ovulation if menstruation is irregular?

Generally speaking, a woman's menstrual cycle is divided into two phases: early and late. The early stage usually lasts 3-5 days, and the late stage usually lasts 7-10 days. If women have irregular menstrual cycles, it can be difficult for them to pinpoint specific dates.

To determine when a woman is ovulating, doctors usually recommend the following methods:

1. Measure basal body temperature: When women wake up every morning, measure their body temperature. The body temperature is usually low during the early stages of the cycle and gradually increases as the cycle begins until the later stages. During a woman's ovulation period, her body temperature usually reaches its highest level, which lasts for about 2-3 days.

2. Observe the "dangerous periods" in the menstrual cycle: In a woman's menstrual cycle, generally speaking, the first 7 days and the last 8 days are safe periods. During this period, a woman’s eggs are easily fertilized, so it is considered a woman’s ovulation period.

3. Use a calendar or calculator: Women can keep track of their menstrual cycles and use a calendar or calculator to predict when they will ovulate. This method usually requires some calculations but can help women better understand their fertility cycles.

While these methods can help women determine when they are ovulating, they do not completely guarantee a woman's fertility. Therefore, women should work with their doctors to develop the best birth plan to ensure they have a successful pregnancy.