What are the causes of amenorrhea?

Sep 13, 2025 Source: Cainiu Health

Dr. Zhang Lu

Introduction

In general, absence of menstruation may be caused by factors such as pregnancy, delayed puberty development, polycystic ovary syndrome (PCOS), hyperprolactinemia, or intrauterine adhesions. It is recommended to seek timely medical attention to determine the underlying cause and receive appropriate treatment under a doctor's guidance. In daily life, it is important to maintain a positive mindset, avoid excessive anxiety, and maintain a regular sleep-wake schedule, avoiding staying up late.

　　In general, the absence of menstruation may be caused by factors such as pregnancy, delayed puberty, polycystic ovary syndrome, hyperprolactinemia, and intrauterine adhesions. It is recommended to seek timely medical attention to determine the underlying cause and receive appropriate treatment under a doctor's guidance. Detailed analysis is as follows:

　　1. Pregnancy: After conception, hormonal changes in a woman's body inhibit ovulation, leading to the cessation of menstruation. This can be confirmed using a pregnancy test strip or a blood HCG test at a hospital. If pregnancy is confirmed, proper prenatal care, regular prenatal checkups, and balanced nutrition are necessary.

　　2. Delayed puberty: In adolescent girls, the reproductive system is not yet fully developed and hormone levels are unstable, which may result in delayed menstruation. Usually, no specific treatment is required. It is important to ensure adequate nutrition, regular sleep patterns, and appropriate exercise in daily life. Menstruation will gradually normalize as the body matures.

　　3. Polycystic ovary syndrome: Endocrine disorders lead to abnormal ovarian ovulation and elevated androgen levels, manifesting as infrequent menstruation or amenorrhea. Patients may follow medical advice to use medications such as ethinylestradiol cyproterone tablets, drospirenone ethinylestradiol tablets, or spironolactone tablets to regulate hormone levels, promote ovulation, and restore menstruation.

　　4. Hyperprolactinemia: Excessively high serum prolactin levels inhibit ovulation, causing absence of menstruation, which may be accompanied by breast galactorrhea. Patients may follow medical advice to use medications such as bromocriptine mesylate tablets, vitamin B6 tablets, or cabergoline tablets to reduce prolactin levels and improve menstrual conditions.

　　5. Intrauterine adhesions: Repeated intrauterine procedures can cause endometrial damage and adhesions, affecting endometrial shedding and resulting in amenorrhea. Patients may follow medical advice to use medications such as estradiol valerate tablets, progesterone capsules, or conjugated estrogens tablets to promote endometrial repair. If necessary, hysteroscopic adhesiolysis may be performed to restore the normal uterine cavity shape and help resume menstruation.

　　In daily life, maintaining a positive mindset, avoiding excessive anxiety, maintaining regular sleep patterns, avoiding staying up late, eating a balanced diet, reducing intake of high-sugar and high-fat foods, engaging in appropriate physical activity, and maintaining a healthy weight are beneficial for stabilizing the endocrine system and preventing menstrual abnormalities.

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What are the reasons for the absence of menstruation after a miscarriage?

In general, possible causes of absent menstruation after a miscarriage may include delayed physiological recovery, psychological factors, endometritis, intrauterine adhesion, premature ovarian failure, etc. It is important to rest adequately after the procedure, avoid excessive fatigue, and ensure sufficient sleep. Maintain good hygiene of the external genitalia to prevent infection. Regular gynecological examinations should also be conducted to detect and address any underlying gynecological conditions in a timely manner.

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What causes endometrial thickening?

Abnormal proliferation of endometrial glands and stroma leads to significant thickening of the endometrium. Some cases exhibit cellular atypia and often present with oligomenorrhea or heavy bleeding after amenorrhea. Some types have a tendency toward malignancy. Treatment should be administered under a physician's guidance using medications such as Megestrol Acetate Dispersible Tablets, Hydroxyprogesterone Caproate Injection, and Compound Megestrol Acetate Tablets.

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What causes endometrial thickening?

Abnormal proliferation of endometrial glands and stroma leads to significant thickening of the endometrium, which may be accompanied by cellular atypia. It often presents with symptoms such as oligomenorrhea and heavy bleeding after amenorrhea, and some types carry a risk of malignancy. Doctors generally prescribe medications such as medroxyprogesterone acetate dispersible tablets, hydroxyprogesterone caproate injection, and compound medroxyprogesterone acetate tablets.

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What to do about an infantile uterus with no menstruation

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