Not having a period doesn't mean she doesn't have a menstrual cycle or ovulation. In fact, many women have irregular bleeding over the next few months, which is called a menstrual cycle. Although the menstrual cycle is very important to a woman's physical health, some women may experience some strange conditions, such as missing a period or irregular bleeding. In this case, are their menstrual cycles and ovulation normal?

There are many causes of abnormal menstrual cycles, including genetic factors, changes in hormonal levels, poor nutrition, disease and medications. Some common reasons include:

1. Genetic factors: Some women may have certain genes that cause them to experience long-term menstrual cycle abnormalities.

2. Changes in hormone levels: Changes in female hormone levels may lead to long-term menstrual cycle abnormalities, such as during puberty, pregnancy, and menopause.

3. Malnutrition: Lack of certain nutrients, such as protein and vitamin B12, can lead to long-term menstrual cycle abnormalities.

4. Illness: Certain illnesses, such as anemia and thyroid problems, can cause long-term menstrual cycle abnormalities.

5. Medications: Certain medications, such as antidepressants and antipsychotics, can cause long-term menstrual cycle abnormalities.

For women who experience chronic menstrual cycle abnormalities, it is recommended that they see a doctor. Doctors may order blood tests and hormone level tests to determine the underlying cause of their irregular periods. Doctors can also provide them with treatment recommendations, such as medications or dietary changes.

Missing a period or irregular bleeding is not uncommon. Although these phenomena may seem mysterious, they do not cause any serious health problems. For women who experience these problems for a long time, it is recommended that they see a doctor to determine if they are normal and to get appropriate treatment recommendations.