Extended-cycle oral contraception: a new option for routine use.

Extended use of oral contraceptive (OC) pills can successfully suppress endometrial activity and prevent menstruation for several months. Given that missed menses in women not using hormonal contraception may be of medical concern, understanding how hormonal contraceptives eliminate these concerns is important for both patient and healthcare provider acceptance. OC withdrawal bleeding is an artificial, iatrogenic event, which results from the deliberate, periodic interruption of hormonal support of the endometrium. Historically, it was important to provide periodic bleeding to reassure OC efficacy, but today it is recognized that these bleeding episodes are medically unnecessary and cause patient discomfort and out-of-pocket expenses. Decades of experience with prolonged use of OCs have been accumulated for women with specific menstrual-related problems such as endometriosis, dysmenorrhea, and menstrual migraine headaches. Today there is a US FDA-approved product to routinely reduce the number of withdrawal periods. Clinical trials show that there is an initial increase in unscheduled bleeding and spotting days with extended-cycle OC use, but an absolute decrease in total days of bleeding and spotting from the first cycle of use. Over time, unscheduled bleeding and spotting decreases to rates found with the use of conventional-cycle regimens. Every woman who is interested in using OC pills should be offered the opportunity to choose how to use them, to determine if and when she will have withdrawal bleeding.