Description of Abdominal and Gluteo-femoral Subcutaneous Adipose Tissue Cell Population in Women - GLUTAB

Inclusion Criteria: * women between 15 and 45 years old * with genital activity * stable weight during the previous 3 months * BMI from 20 to 28 * regular menstrual cycles (28 +/- 2 days) during the previous 3 months * reliable means of contraception (systemic hormonal contraception, intrauterine contraceptive device, tubal ligation) * using the same way of contraception during the previous 3 months * normal clinical examination * able to be compliant with the schedule of protocol assessments * willing and able to provide written informed consent * affiliated to a National Health Service * agreeing to being registered on the national file for subjects participating in biomedical research Exclusion Criteria: * Exclusions related to significant medical disturbances : * type I and II diabetes * early menopause * serious psychological disorders * uncontrolled thyroid disorders * know allergy to local anesthetics especially Xylocaine * abnormal laboratory results * medical history that, in the opinion of the investigator, makes the subject unsuitable for enrollment * positive test result for HIV, HCV and/or HBV virus * positive pregnancy test * Exclusions related to subject lifestyle : * smoking \> 10 cigarettes per day * smoking cessation during the previous 3 months * weight fluctuation (\>3kg) during the previous 3 months * alcohol abuse * coffee or tea consumption \> 6 cups per day * high consumption of drinks comprising xanthine bases (\>0.5 liters/day) * consumption of dr…