Menstrual Disorders:

There are a number of different menstrual disorders. Problems can range from heavy, painful periods to no period at all. There are many variations in menstrual patterns, but in general women should be concerned when periods come fewer than 21 days or more than 3 months apart, or if they last more than 10 days. Such events may indicate ovulation problems or other medical conditions.

Dysmenorrhea (Painful Cramps)

Dysmenorrhea is severe, frequent cramping during menstruation. Pain occurs in the lower abdomen but can spread to the lower back and thighs. Dysmenorrhea is usually referred to as primary or secondary.

Primary dysmenorrhea. Cramps occur from contractions in the uterus. These contractions are a normal part of the menstrual process. With primary dysmenorrhea, cramping pain is directly related to and caused by menstruation. About half of menstruating women have primary dysmenorrhea. It usually begins 2 - 3 years after a women begins to menstruate. The pain typically develops when the bleeding starts and continues for 32 - 48 hours. Cramps are generally most severe during heavy bleeding.

Secondary dysmenorrhea. Secondary dysmenorrhea is menstrual-related pain that accompanies another medical or physical condition, such as endometriosis or uterine fibroids.

Heavy Bleeding

During a normal menstrual cycle, the average woman loses about 1 ounce (30 mL) of blood. Most women change their tampons or pads around 3 - 6 times per day. Menorrhagia is the medical term for significantly heavier bleeding. Menorrhagia can be caused by a number of factors.

Women often overestimate the amount of blood lost during their periods. Clot formation is fairly common during heavy bleeding and is not a cause for concern. However, women should consult their doctor if any of the following occurs:

• Soaking through at least one pad or tampon every 1 - 2 hours for several hours
• Heavy periods that regularly last 10 or more days
• Bleeding between periods or during pregnancy. Spotting or light bleeding between periods is common in girls just starting menstruation and sometimes during ovulation in young adult women, but it is still a good idea to speak with a doctor.

Several terms are often used to describe different patterns of heavy bleeding:

• Menorrhagia refers to long (greater than 7 days) or excessive (more than 80 mL) bleeding that occurs at regular intervals
• Metrorrhagia refers to bleeding which occurs at frequent but irregular intervals, and with variable amounts
• Menometrorrhagia refers to prolonged episodes of bleeding that occur at irregular intervals

Amenorrhea (Absence of Menstruation)

Amenorrhea is the absence of menstruation. There are two categories: primary amenorrhea and secondary amenorrhea. These terms refer to the time when menstruation stops:

• Primary amenorrhea occurs when a girl does not begin to menstruate by age 16. Girls who show no signs of sexual development (breast development and pubic hair) by age 13 should be evaluated by a doctor. Any girl who does not have her period by age 15 should be evaluated for primary amenorrhea.
• Secondary amenorrhea occurs when periods that were previously regular stop for at least three months.

Oligomenorrhea (Light or Infrequent Menstruation)

Oligomenorrhea is a condition in which menstrual cycles are infrequent, greater than 35 days apart. It is very common in early adolescence and does not usually indicate a medical problem.

When girls first menstruate they often do not have regular cycles for a couple of years. Even healthy cycles in adult women can vary by a few days from month to month. Periods may occur every 3 weeks in some women, and every 5 weeks in others. Flow also varies and can be heavy or light. Skipping a period and then having a heavy flow may occur; this is most likely due to missed ovulation rather than a miscarriage.

Premenstrual Syndrome (PMS)

Premenstrual syndrome (PMS) is a set of physical, emotional, and behavioral symptoms that occur during the last week of the luteal phase (a week before menstruation) in most cycles. The symptoms typically do not start until at least day 13 in the cycle, and resolve within 4 days after bleeding begins. Women may begin to have premenstrual syndrome symptoms at any time during their reproductive years. Once established, the symptoms tend to remain fairly constant until menopause, although they can vary from cycle to cycle. [For more information, see In-Depth Report #79: Premenstrual syndrome.]