Amenorrhea
Amenorrhea: Excerpt from Signs & Symptoms: A 2-in-1 Reference for Nurses
The absence of menstrual flow, amenorrhea can be classified as primary or secondary. With primary amenorrhea, menstruation fails to begin before age 16. With secondary amenorrhea, it begins at an appropriate age but later ceases for 3 or more months in the absence of normal physiologic causes, such as pregnancy, lactation, or menopause.
Pathologic amenorrhea results from anovulation or physical obstruction to menstrual outflow, such as from an imperforate hymen, cervical stenosis, or intrauterine adhesions. Anovulation itself may result from hormonal imbalance, debilitating disease, stress or emotional disturbances, strenuous exercise, malnutrition, obesity, or anatomic abnormalities, such as congenital absence of the ovaries or uterus. Amenorrhea may also result from drug or hormonal treatments. (See How amenorrhea develops, pages 38 and 39.)
History
Begin by determining whether the amenorrhea is primary or secondary. If it’s primary, ask the patient at what age her mother first menstruated because age of menarche is fairly consistent in families. Form an overall impression of the patient’s physical, mental, and emotional development because these factors as well as heredity and climate may delay menarche until after age 16.
If menstruation began at an appropriate age but has since ceased, determine the frequency and duration of the patient’s previous menses. Ask her about the onset and nature of any changes in her normal menstrual pattern, and determine the date of her last menses. Find out if she has noticed any related signs, such as breast swelling or weight changes.
Determine when the patient last had a physical examination. Review her health history, noting especially any long-term illnesses such as anemia or use of hormonal contraceptives. Ask about exercise habits, especially running, and whether she experiences stress on the job or at home. Probe the patient’s eating habits, including the number and size of daily meals and snacks, and ask if she has gained weight recently.
Physical assessment
Observe her appearance for secondary sex characteristics or signs of virilization. If you’re responsible for performing a pelvic examination, check for anatomic aberrations of the outflow tract, such as cervical adhesions, fibroids, or an imperforate hymen.
Medical causes
Adrenal tumor
In a patient with an adrenal tumor, amenorrhea may be accompanied by acne, thinning scalp hair, hirsutism, increased blood pressure, truncal obesity, and psychotic changes. Asymmetrical ovarian enlargement in conjunction with rapid onset of virilizing signs is usually indicative.
Adrenocortical hyperplasia
In a patient with adrenocortical hyperplasia, amenorrhea precedes characteristic cushingoid signs, such as truncal obesity, moon face, buffalo hump, bruises, purple striae, hypertension, renal calculi, psychiatric disturbances, and widened pulse pressure. Acne, thinning scalp hair, and hirsutism typically appear.
Adrenocortical hypofunction
Besides amenorrhea, adrenocortical hypofunction may cause fatigue, irritability, weight loss, increased pigmentation (including bluish black discoloration of the areolas and mucous membranes of the lips, mouth, rectum, and vagina), nausea, vomiting, and orthostatic hypotension.
Anorexia nervosa
Anorexia nervosa, a psychological disorder, can cause either primary or secondary amenorrhea. Related findings include significant weight loss, a thin or emaciated appearance, compulsive behavior patterns, blotchy or sallow complexion, constipation, reduced libido, decreased pleasure in once-enjoyable activities, dry skin, loss of scalp hair, lanugo on the face and arms, skeletal muscle atrophy, and sleep disturbances.
Congenital absence of the ovaries and uterus
Congenital absence of the ovaries and uterus results in primary amenorrhea and absence of secondary sex characteristics. Primary amenorrhea occurs with congenital absence of the uterus. The patient may not develop breasts.
Corpus luteum cysts
Corpus luteum cysts may cause sudden amenorrhea as well as acute abdominal pain and breast swelling. Examination may reveal a tender adnexal mass and vaginal and cervical hyperemia.
Hypothyroidism
Deficient thyroid hormone levels can cause primary or secondary amenorrhea. Typically vague, early findings include fatigue, forgetfulness, cold intolerance, unexplained weight gain, and constipation. Subsequent signs include bradycardia; decreased mental acuity; dry, flaky, inelastic skin; puffy face, hands, and feet; hoarseness; periorbital edema; ptosis; dry, sparse hair; and thick, brittle nails. Other common findings include anorexia, abdominal distention, decreased libido, ataxia, intention tremor, nystagmus, and delayed reflex relaxation time, especially in the Achilles tendon.
Pituitary infarction
Pituitary infarction usually causes postpartum failure to lactate and failure to resume menses. Although associated signs and symptoms depend on the infarction’s severity, they include headaches, visual field defects, oculomotor palsies, and an altered level of consciousness. The patient may also lose pubic and axillary hair.
Pituitary tumor
Amenorrhea may be the first sign of a pituitary tumor. Associated findings include headache, vision disturbances such as bitemporal hemianopia, and acromegaly. Cushingoid signs include moon face, buffalo hump, hirsutism, hypertension, truncal obesity, bruises, purple striae, widened pulse pressure, and psychiatric disturbances.
Polycystic ovary syndrome
In polycystic ovary syndrome, menarche typically occurs at a normal age and is followed by irregular menstrual cycles, oligomenorrhea, and secondary amenorrhea or periods of profuse bleeding may alternate with periods of amenorrhea. Obesity, hirsutism, slight deepening of the voice, and enlarged, “oysterlike” ovaries may also accompany this disorder.
Pseudoamenorrhea
With pseudoamenorrhea, an anatomic anomaly such as imperforate hymen obstructs menstrual flow, causing primary amenorrhea and, possibly, cyclic episodes of abdominal pain. Examination may reveal a pink or blue bulging hymen.
Testicular feminization
Primary amenorrhea may signal testicular feminization, a form of male pseudohermaphroditism. The patient, outwardly female but genetically male, shows breast and external genital development but scant or absent pubic hair.
Thyrotoxicosis
Thyroid hormone overproduction may result in amenorrhea. Classic signs and symptoms include an enlarged thyroid (goiter), nervousness, heat intolerance, diaphoresis, tremors, palpitations, tachycardia, dyspnea, weakness, and weight loss despite increased appetite.
Turner’s syndrome
Primary amenorrhea and failure to develop secondary sex characteristics may signal Turner’s syndrome, a syndrome of genetic ovarian dysgenesis. Typical features include short stature, webbing of the neck, low nuchal hairline, a broad chest with widely spaced nipples and poor breast development, underdeveloped genitalia, and edema of the legs and feet.
Other causes
Drugs
Busulfan, chlorambucil, injectable or implanted contraceptives, cyclophosphamide, and phenothiazines may cause amenorrhea. Hormonal contraceptives may cause anovulation and amenorrhea after they’re discontinued.
Radiation therapy
Irradiation of the abdomen may destroy the endometrium or ovaries, causing amenorrhea.
Surgery
Surgical removal of both ovaries or the uterus produces amenorrhea.
Special considerations
In patients with secondary amenorrhea, physical and pelvic examinations must rule out pregnancy before diagnostic testing begins. Typical tests include progestin withdrawal, serum hormone and thyroid function studies, and endometrial biopsy.
Pediatric pointers
Adolescent girls are especially prone to amenorrhea caused by emotional upsets, typically stemming from school, social, or family problems.
Geriatric pointers
In women older than age 50, amenorrhea usually represents the onset of menopause.
Patient counseling
After diagnosis, answer the patient’s questions about the type of treatment that will be provided and its expected outcome. Because amenorrhea can cause severe emotional distress, provide emotional support. Be sure to encourage the patient to discuss her fears and, if necessary, refer her for psychological counseling.
Pictures
Book Source Details
- Book Title: Signs & Symptoms: A 2-in-1 Reference for Nurses
- Author(s): Springhouse
- Year of Publication: 2007
- Copyright Details: Signs & Symptoms: A 2-in-1 Reference for Nurses, Copyright © 2007 Lippincott Williams & Wilkins.
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Copyright notice for book excerpts: Copyright © 2008 Lippincott Williams & Wilkins. All rights reserved.
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