Amenorrhea is the medical term for the absence of menstrual periods. It means that a girl or woman does not have menstrual bleeding when it would normally be expected. Amenorrhea is not a disease by itself but may be a sign of an underlying medical, hormonal, nutritional, reproductive, or lifestyle-related condition. Missing a period can sometimes occur temporarily due to normal life events such as pregnancy or breastfeeding. However, persistent or unexplained absence of menstruation should be evaluated by a healthcare professional. There are two main types of amenorrhea:
Primary amenorrhea refers to the absence of the first menstrual period (menarche) in an adolescent girl. Medical evaluation is generally recommended if menstruation has not started by around age 15, or if there are other signs of delayed puberty.
Secondary amenorrhea occurs when a woman who previously had menstrual periods stops having them for three months or longer when her periods were previously regular, or for about six months when her periods were irregular.
Pregnancy is one of the most common natural causes of secondary amenorrhea in women of reproductive age.
The main symptom of amenorrhea is absence of menstrual periods. Depending on the underlying cause, other symptoms may occur, including:
Acne
Changes in breast size
Breast tenderness
Hair loss or thinning hair
Increased facial or body hair growth
Headache
Milky discharge from the nipples when not breastfeeding
Pelvic pain
Unexplained weight gain or weight loss
Hot flashes or night sweats
Vaginal dryness
Changes in sexual desire
Vision changes
Excessive fatigue
The symptoms can vary considerably depending on whether the cause is related to the ovaries, uterus, pituitary gland, thyroid gland, nutrition, medications, or another condition.
Certain medicines can affect menstrual cycles and may cause amenorrhea. These can include some:
Antipsychotic medications
Antidepressants
Cancer chemotherapy medicines
Blood pressure medicines
Other medicines that affect hormone levels
Hormonal contraceptives, including some birth-control pills, injections, implants, and intrauterine devices (IUDs), can also alter or stop menstrual bleeding in some women.
A doctor will usually begin by asking about the patient’s menstrual history, medical history, medications, diet, exercise habits, weight changes, and other symptoms. In women and girls of reproductive age, a pregnancy test is commonly performed first when appropriate. Depending on the suspected cause, investigations may include:
Physical and pelvic examination
Pregnancy test
Blood tests to check hormone levels
Thyroid function tests
Prolactin testing
Tests for ovarian and reproductive hormones
Androgen or testosterone testing when indicated
Pelvic ultrasound
Other imaging tests when necessary
MRI of the brain or pituitary gland in selected cases
Genetic or chromosomal testing in certain cases of primary amenorrhea
The specific tests depend on the person’s age, symptoms, menstrual history, and suspected underlying condition.
Treatment depends on the underlying cause. There is no single treatment that is appropriate for every person with amenorrhea. Possible treatments may include:
Treating an underlying thyroid or hormonal disorder
Managing PCOS and associated metabolic or hormonal problems
Improving nutrition and achieving a healthy body weight
Reducing excessive exercise when it is contributing to menstrual suppression
Addressing significant psychological stress
Changing or adjusting medicines when medically appropriate
Hormonal therapy in selected patients
Treatment for premature ovarian insufficiency when appropriate
Surgical treatment for certain structural abnormalities or reproductive tract problems
A doctor should determine the appropriate treatment after identifying the cause.
Amenorrhea can sometimes affect fertility because the absence of menstrual periods may indicate that ovulation is not occurring normally. However, amenorrhea does not necessarily mean permanent infertility. Fertility may return when the underlying cause is treated or corrected. Women who are trying to become pregnant and have absent or irregular periods should discuss their situation with a gynaecologist or fertility specialist.
The primary specialist for evaluation of amenorrhea is a:
Gynaecologist and Obstetrician
Depending on the suspected cause, a doctor may also recommend consultation with an endocrinologist, reproductive medicine specialist, or other appropriate specialist.
No. Amenorrhea means menstrual periods are absent for a prolonged period, whereas irregular periods refer to menstrual cycles that occur at unpredictable intervals or vary significantly in length.
Yes. Significant physical or emotional stress can interfere with the hormones responsible for ovulation and menstruation and may lead to temporary absence of periods.
Yes. Being significantly underweight, losing weight rapidly, or not getting adequate nutrition can disrupt reproductive hormone production and cause amenorrhea.
Yes. Very intense exercise, particularly when combined with inadequate calorie intake or low body fat, can interfere with normal reproductive hormone function.
In many cases, yes. Treatment depends on the underlying cause. Correcting nutritional problems, treating hormonal disorders, modifying certain lifestyle factors, or using appropriate medical or surgical treatment may help restore menstruation.
No. Pregnancy is an important cause of missed periods in women of reproductive age, but many other conditions can also cause amenorrhea. A pregnancy test is generally recommended when pregnancy is possible.
It can. Some causes of amenorrhea prevent regular ovulation and may make it difficult to become pregnant. Treating the underlying cause may restore ovulation and improve fertility in some women.
Medical Disclaimer: This article is intended for general educational and informational purposes only. It should not be considered a substitute for professional medical advice, diagnosis, or treatment. Anyone experiencing persistent or unexplained absence of menstrual periods should consult a qualified healthcare professional.
