Premature Ovarian Insufficiency
A 26-year-old woman had menarche at 15 years and now presents with no menstrual period for 9 months. She has never been pregnant and her urine pregnancy test is negative. She reports hot flushes and vaginal dryness, and has had no uterine surgery. Serum follicle-stimulating hormone is 58 IU/L, estradiol 40 pmol/L, prolactin normal, and thyroid-stimulating hormone normal. Which of the following is the most likely diagnosis?
- A.Polycystic ovary syndrome
- B.Asherman syndrome
- C.Hormone-secreting ovarian tumor
- D.Premature ovarian insufficiencyCorrect
Explanation
Premature ovarian insufficiency is loss of ovarian function before the age of 40 and is diagnosed by amenorrhea or oligomenorrhea for at least 4 months together with a follicle-stimulating hormone in the menopausal range, conventionally above 25 to 40 IU/L, on two occasions at least 4 weeks apart, with a low estradiol. This patient fits precisely, and her hot flushes and vaginal dryness reflect the resulting estrogen deficiency. Causes include idiopathic, autoimmune, genetic such as Turner syndrome and fragile X premutation, and iatrogenic causes such as chemotherapy or pelvic radiotherapy, so workup includes karyotype, FMR1 premutation testing, and adrenal and thyroid autoantibodies. Polycystic ovary syndrome causes oligomenorrhea with normal or low follicle-stimulating hormone, normal or high estradiol, and hyperandrogenism, the mirror image of these results. Asherman syndrome causes amenorrhea from intrauterine adhesions after instrumentation or infection, with entirely normal gonadotropins and no vasomotor symptoms, and she has had no uterine surgery. A hormone-secreting ovarian tumor typically produces androgenic or estrogenic effects rather than hypergonadotropic hypogonadism. Management is estrogen and progestogen replacement until the average age of menopause to protect bone and cardiovascular health, with donor oocyte counseling for fertility.
Why each option
- A.
- Polycystic ovary syndrome shows normal or low follicle-stimulating hormone with androgen excess, not menopausal-range gonadotropins.
- B.
- Asherman syndrome follows uterine instrumentation and produces amenorrhea with normal hormone levels and no hot flushes.
- C.
- Hormone-secreting ovarian tumors cause androgenic or estrogenic features rather than high FSH with low estradiol.
- D.
- Correct. Amenorrhea before 40 with high FSH, low estradiol, and vasomotor symptoms defines premature ovarian insufficiency.
Reference: ESHRE Guideline: Premature Ovarian Insufficiency, 2024
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