Spontaneous/Natural menopause is the final menstrual period confirmed after 12 consecutive months of amenorrhea with no pathological cause.
Induced menopause is the permanent cessation of menstruation after bilateral oophorectomy (ie surgical menopause) or iatrogenic ablation of ovarian function (eg pelvic radiation therapy, chemotherapy).
Perimenopause/Menopause transition/Climacteric is the duration when menstrual cycle & endocrine changes occur a few years before and 12 months after the final menstrual period resulting from natural menopause.
Premature menopause is menopause before 40 years of age whether natural or induced while early menopause is spontaneous or induced menopause that occurs before the average age of natural menopause at 51 years or under 45 years of age.
The use of an oestradiol patch in addition to oral intermittent micronized progesterone for 1 year helped prevent the development of depressive symptoms in women going through menopause, particularly those in the early stages of the menopause transition, a recent study found.
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