Complex sentence: Clinically speaking, menopause is defined as a specific date; assuming the woman still has a uterus, the date is the day after the woman's final episode of menstrual flow finishes.
Split into simpler sentences: Clinically speaking, menopause is defined as a specific date. Assuming the woman still has a uterus, menopause is defined as the day after the woman's final episode of menstrual flow finishes.