Also known as Unpredictable periods, Metrorrhagia, and Breakthrough Bleeding
Metrorrhagia (metro = womb, -rrhagia = excessive flow) is uterine bleeding at irregular intervals, particularly between the expected menstrual periods.Source: Wikipedia
The most common causes of unpredictable menstruation are idiopathic irregular menstrual cycle, idiopathic excessive menstruation, and uterine fibroids. Other possible causes, such as idiopathic painful menstruation, are more rare.
Within all the people who go to their doctor with unpredictable menstruation, 40% report having heavy menstrual flow, 29% report having sharp abdominal pain, and 28% report having painful menstruation.
Patients with unpredictable menstruation often receive pelvis exam, hematologic tests, examination of breast, urinalysis, ultrasonography, standard pregnancy test, complete physical skin exam performed (ml) and chlamydia test .
The most commonly prescribed drugs for patients with unpredictable menstruation include medroxyprogesterone, ortho cyclen, drospirenone / ethinyl estradiol, modicon, portia, clomiphene (clomid), human papillomavirus vaccine (hpv), ethinyl estradiol / norgestrel, desogestrel / ethinyl estradiol, progesterone, frovatriptan (frova), levonorgestrel and estrogens, conjugated (usp) / medroxyprogesterone .
Groups of people at highest risk for unpredictable menstruation include race/ethnicity = other, age 30-44 years, sex == female and age 15-29 years. On the other hand, age 75+ years, sex == male, age 60-74 years, age 1-4 years, and age < 1 years almost never get unpredictable menstruation.