Irregular menstrual cycles can be annoying, exhausting, and sometimes unsettling for women. “Normal” periods generally come every 28 days or so and last roughly 5 days; anything else is considered irregular. Irregular menses can be periods that occur every 21 days or less, greater than 35 days or more, skip all together, or last all month long. Irregular menses can be frustrating, and our women’s health specialists are here to help get you back in sync.