Investigation of Copy Number Variations and Genetic Variants in POI

Primary ovarian insufficiency (POI), also known as premature ovarian failure, is an ovarian defect characterized by the premature (before the age of 40 years) depletion of ovarian follicles. POI affects about 1% of women, reaching 30% in some familial cases. This heterogeneous disorder is characterized by progressive cessation of the ovarian function with temporary or intermittent amenorrhea associated with elevated serum FSH concentration and low AMH dosage. Low serum AMH dosage is able to detect a diminished ovarian pool occurring before the onset of FSH elevation and the ultimate deficiency leading to amenorrhea. POI causes infertility and a poor ovarian response in IVF stimulations, and it has important health consequences for affected patients, including psychological distress, infertility, osteoporosis, autoimmune disorders, ischaemic heart disease. Although the cause of POI remains unknown in about 80% of the cases, several mechanisms have been proposed to explain ovarian dysfunction. Currently, a wide spectrum of causes has been linked to POI, including genetic, autoimmune, infectious, or iatrogenic ones. Genetic causes are highly heterogeneous and might explain at least some of the sporadic idiopathic cases, which comprise 50-90% of cases. Ten to fifteen percent of cases are X-linked abnormalities, mainly Turner Syndrome (45,X) or X structural abnormalities such as X deletions, X inversions, isochromosomes or X-autosome translocations. Also fragile X mental retar…

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Paola Scaruffi, PhD  ·  paola.scaruffi@hsanmartino.it

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