My period hasn't come for six months.

"Da Yi Ma" usually refers to menstruation. If menstruation has not occurred for six months, it may be caused by physiological or pathological factors, such as hormonal imbalances or polycystic ovary syndrome (PCOS). Specific causes are as follows:

I. Physiological Factors

When a patient becomes pregnant, the levels of estrogen and progesterone in the body may increase. As a result, the endometrium does not undergo periodic shedding, leading to the absence of menstruation described above. This is a normal physiological phenomenon that does not require special treatment—regular prenatal checkups are sufficient.

II. Pathological Factors

1. Hormonal Imbalance

If a patient frequently experiences significant emotional fluctuations or inadequate nutrition in daily life, it may lead to hormonal disturbances, resulting in the condition described. Patients should visit a正规 hospital and, under a doctor's guidance, take medications such as methimazole tablets or propylthiouracil tablets.

2. Polycystic Ovary Syndrome (PCOS)

This condition typically affects women of reproductive age and is a group of symptoms involving reproductive disorders and endocrine dysfunction. Common manifestations include amenorrhea (absence of menstruation) or reduced menstrual flow. Patients may follow medical advice to use medications such as dydrogesterone tablets or medroxyprogesterone acetate tablets.

In addition to the above, other possible causes include pituitary tumors, endometrial cancer, and endometrial hyperplasia. The absence of menstruation for six months in women is considered a serious condition. It is recommended that patients promptly seek medical attention at a正规 hospital to avoid delays in diagnosis and treatment.