Stomach pain during ovulation is a common physiological phenomenon that usually occurs in the middle stage of the menstrual cycle, that is, between the 14th and 16th days of the menstrual cycle. This phenomenon usually manifests itself as mild discomfort and pain in the abdomen, but does not necessarily cause significant pain or discomfort.

1. Egg discharge: During the ovulation period, a woman’s egg is discharged from the ovary. This is a critical moment. If the egg discharge is not smooth or interfered with, it may cause abdominal discomfort or pain.

2. Uterine contractions: During ovulation, the uterus may contract, which may cause abdominal discomfort or pain. This phenomenon is called "uterine diary" and is what many women experience during this process.

3. Hormone changes: During ovulation, hormone levels in the body change, which may cause abdominal discomfort or pain. For example, increases in ovarian hormones and testosterone may cause pain and discomfort.

4. Digestive problems: Some digestive problems, such as acid reflux or inflammation, may also cause abdominal discomfort or pain, especially during ovulation.

Although the cause of ovulation stomach pain is unknown, many women are familiar with it and feel comfortable with it. If you experience this phenomenon regularly, or if you experience discomfort or pain, please consult your doctor for further advice and treatment.