Premature ovarian failure was studied in ten women under the age of 30; eight had an ovarian biopsy and five of these showed primordial follicles. Plasma levels of oestradiol and progesterone were similar to the follicular phase of a normal menstrual cycle, but in eight patients cervical smears showed a cornification index of less than one per cent. Levels of both androgens and of sex hormone binding globulin capacity were generally normal. Administration of LH-RH caused a release of FSH which was similar to post menopausal women and higher than both. Two patients were treated with exogenous gonadotrophins without effect.
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