Perimenopause is the 2-8 years before menstrual periods stop completely. During this time, the production of estrogen decreases, and the menstrual cycle fluctuates. Many women experience hot flashes and night sweats. Heavy periods and growth of fibroids are more likely to occur early in perimenopause. Taking oral contraceptives such as Ortho Tri-Cyclen can help to reduce the hot flashes and ease other symptoms which commonly occur during this time.