The purpose of this study is to test whether a oral micronized progesterone reduces the
Vasomotor Symptom Score comprised of the number and severity of hot flushes and night sweats
in perimenopausal women. Oral micronized progesterone is molecularly identical to human
progesterone, a steroid hormone. It is sold by prescription for use to prevent endometrial
cancer in women taking estrogen in menopause. This research study will test whether
progesterone reduces perimenopausal hot flushes and night sweats. It will also test whether
progesterone improves sleep disturbances and anxiety.