There are many causes of infertility. Normally, if a couple has been married for a year without using contraception and does not have a child, they are generally diagnosed with infertility. Infertility patients can develop from causes such as hormonal imbalances, which might lead to menstrual disorders and lack of normal ovulation, resulting in infertility. Infections like mycoplasma and chlamydia can also cause infertility, as can immune issues, abnormal ovulation, or problems with the fallopian tubes. However, infertility does not necessarily mean an absence of menstruation. Some patients may have normal menstrual cycles and ovulation. The reason for infertility in such cases might be due to blocked fallopian tubes or other hormonal issues. Therefore, whether an infertility patient has menstruation can vary; some may have a normal menstrual cycle, while others may not.