Heavy menstrual bleeding (HMB), which is the preferred term for menorrhagia, affects~90% of women with an underlying bleeding disorder and~70% of women on anticoagulation. HMB can be predicted on the basis of clots of ‡1 inch diameter, low ferritin, and "flooding" (a change of pad or tampon more frequently than hourly). The goal of the work-up is to determine whether there is a uterine/endometrial cause, a disorder of ovulation, or a disorder of coagulation. HMB manifest by flooding and/or prolonged menses, or HMB accompanied by a personal or family history of bleeding is very suggestive of a bleeding disorder and should prompt a referral to a hematologist. The evaluation will include the patient's history, pelvic examination, and/or pelvic imaging, and a laboratory assessment for anemia, ovulatory dysfunction, underlying bleeding disorder, and in the case of the patient on anticoagulation, assessment for over anticoagulation. The goal of treatment is to reduce HMB. Not only will the treatment strategy depend on whether there is ovulatory dysfunction, uterine pathology, or an abnormality of coagulation, the treatment strategy will also depend on the age of the patient and her desire for immediate or long-term fertility. Hemostatic therapy for HMB may serve as an alternative to hormonal or surgical therapy, and may even be life-saving when used to correct an abnormality of coagulation.
Learning Objectives• Identify 3 clinical features that correlate with true HMB • Name the first-line therapies for HMB Heavy menstrual bleeding (HMB), which is the preferred term for menorrhagia, affects~90% of women with an underlying bleeding disorder 1 and~70% of women on anticoagulation. [2][3][4][5] It is a condition hematologists are expected to understand and, in some cases, to help manage. This paper will describe normal menstruation, define HMB, summarize the causes of HMB, describe the gynecologic and hematologic evaluation of HMB, and discuss the hormonal, surgical, and hemostatic management of HMB.
Normal menstruationThe following description of normal menstruation applies to all reproductive-age women, including adolescents. If fertilization (pregnancy) does not occur, the menstrual cycle begins with the sloughing or shedding of the lining of the uterus (ie, the endometrium). Then, under the influence of estrogen from ovarian follicles, the endometrium increases in thickness due to the development of glands and blood vessels. Approximately mid-cycle (in a normal cycle), ovulation occurs. The dominant ovarian follicle undergoes a process described as luteinization, becomes a corpus luteum, and secretes progesterone. Under the influence of progesterone, the endometrial glands mature and become secretory. In the absence of fertilization, the endometrial vessels constrict and the newly developed portion of the endometrium, including the new glands and blood vessels, becomes ischemic and starts to slough, thereby beginning another cycle (Figure 1).