Ventricular Repolarization in Patients With Premature Ovarian Insufficiency (QTIOP)

Inclusion Criteria: Patients with POI * Patient aged 18 to 41 years * Patient with POI diagnostic criteria (FSH \>25UI/l twice at intervals of a few weeks) with amenorrhea * No hormone treatment interacting with the gonadotropic axis for at least one month before inclusion * Patient who has signed informed consent * Patient affiliated to a social security system Healthy volunteers (including POI control group) * Healthy women, aged 18 to 40 years, age-matched (+/- 5 years), and by BMI class (BMI\<18, 18-25, 25-30, 30-35, 35-40, \>40) compared to women with BPI * Women with regular cycles of 26 to 32 days * Women who has signed an informed consent form * Patient affiliated to a social security system Exclusion Criteria: Patients with POI * Patient on HRT during the 1st evaluation * Pregnant or breastfeeding woman * Treatment regimen known to lengthen QT or act on ventricular repolarization * Cardiac history in particular cardiac rhythm disorder * Diabetes * Patient on AME (unless derogation from affiliation), * Severe renal insufficiency (MDRD \<30ml/min/m²) Healthy volunteers (including POI control group) * Diabetes or any chronic disease (including cardiovascular and endocrine) * Pregnant or breastfeeding woman * Hormonal contraceptive treatment in progress or stopped less than 3 months ago * Chronic treatment affecting the duration of QTc * Woman under AME (unless affiliation derogation)