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Causes of Amenorrhea

March 11, 2010

PRIMARY AMENORRHEA

Abnormalities of chromosomes Certain chromosomal abnormalities can cause a premature depletion of the eggs and follicles involved in ovulation and menstruation.

Problems with the hypothalamus. that acts as a control center for our body and regulates our menstrual cycle.

Pituitary tumor and hypothalamus

Disease of Pituitary. The pituitary is another gland in the brain that’s involved in regulating the menstrual cycle. A tumor or other invasive growth may disrupt the pituitary gland’s ability to perform this function.

Structural abnormality of the vagina. An obstruction of the vagina.

Lack of reproductive organs. during fetal development by which  a girl being born without some major part of her reproductive system, such as her uterus, cervix or vagina.

SECONDARY AMENORRHEA
Secondary amenorrhea is more common than primary amenorrhea.

Pregnancy. In women of reproductive age, pregnancy is the most common cause of amenorrhea.

Contraceptives. Some women who take birth control pills may not have periods. When oral contraceptives are stopped, it may take three to six months to resume regular ovulation and menstruation.

Breast-feeding. Mothers who breast-feed often experience amenorrhea. Although ovulation may occur, menstruation may not. Pregnancy can result despite the lack of menstruation.

Low body weight. Women who have an eating disorder, such as anorexia or bulimia, often stop having periods because of these abnormal hormonal changes.

Excessive and severe exercise can cause amenorrhea

Excessive exercise. Women who participate in sports that require rigorous training, may find their menstrual cycle interrupted.

Thyroid malfunction. An underactive thyroid gland (hypothyroidism) commonly causes menstrual irregularities, including amenorrhea.

Stress. Mental stress can temporarily alter the functioning of the hypothalamus,  an area of the brain that controls the hormones that regulate your menstrual cycle.

Medication. For example, antidepressants, antipsychotics, some chemotherapy drug

Hormonal imbalance. A common cause of amenorrhea or irregular periods is polycystic ovary syndrome (PCOS). This condition causes relatively high and sustained levels of estrogen and androgen, a male hormone, rather than the fluctuating levels seen in the normal menstrual cycle.

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