Menopause occurring before the age of 40. It may be caused by autoimmunity, chemotherapy, radiotherapy, or genetic factors, for example a mutation in the FSH receptor gene causing excess secretion of gonadotrophins and small underdeveloped ovaries. Treatment is by hormone replacement, either with the contraceptive pill or HRT. Oocyte donation should be discussed if the patient wishes it.
Subjects: Medicine and Health.