Eligibility Criteria:
Inclusion Criteria:
* Female premenopausal healthy volunteers having given their informed written consent at the first selection visit,
* Registered with Social Security in agreement with the French Law on biomedical research on volunteers,
* Sufficiently co-operative to meet the needs of the study,
* Accepting not to become pregnant during the trial,
* Accepting the use of condoms as the single authorized contraceptive means during the trial,
* With a diurnal and regular job or activity,
* Aged 18 to 35 years old inclusive,
* Non-smokers or current smokers of less than 10 cigarettes/day,
* With normal eating habits,
* With a body mass index between 17 and 27 inclusive,
Exclusion Criteria:
* Participation in another clinical trial,
* Blood donation in the three months prior to Visit V1 or intention to donate blood during the trial or within the three months following the trial completion,
* Virgins, because of the gynecological examination,
* Subjects who were within the exclusion period in the Healthy Volunteers National Register of the French Ministry of Health,
* Forfeiture of freedom by administrative or legal award or under guardianship,
* No possible contact in case of emergency,
* Strenuous physical activity planned during the trial. Concerning the gynecological status and examination
* History of major medical, psychiatric illness or surgery,
* Any acute or chronic systemic disease or disorder,
* History of hypersensitivity to at least one drug (abnormal drug reaction or idiosyncrasy or asthma),
* Abuse of alcohol i.e. history or evidence of acute or chronic abuse, more than 45 g of alcohol per day,
* Excessive drinking of tea, coffee, chocolate, and/or beverages containing caffeine (\>5 cups/day or approximately 500 mg of caffeine per day),
* Current vascular pathology or with a past history of thrombo-embolic disease, arterial hypertension (BPS ≥ 160 mm Hg or BPD ≥ 95 mm Hg), coronary artery disease, valvulopathy; thrombogenic cardiac rhythm disturbances, cerebrovascular disease, ocular pathology of vascular origin,
* Cancer or progressive hematological disorder,
* Current or past history of pituitary tumors,
* Epilepsy,
* Known hyperprolactinemia,
* Known renal insufficiency,
* Severe or recent liver disease or symptomatic vesicular lithiasis, or recurrent cholestasis or recurring pruritus of pregnancy,
* Abnormality (\> 1N) in liver function on the selection laboratory investigation (ALT or AST \> 50 IU/L or alkaline phosphatases \> 125 IU/L or total bilirubin \> 22 μmol/L or GGT \> 70 IU/L),
* Known diabetes or fasting blood sugar \> 6.2 mmol/L (1N) at the selection laboratory investigation,
* Uncontrolled treated dyslipidemia or cholesterolemia \> 5.2 mmol/L (93%N), then \> 6.2 mmol/L (110%N) after protocol amendment during the course of the study, or triglyceridemia \> 1.80 mmol/L (79 %N) at the selection laboratory investigation,
* Plasma creatinine \> 115 μmol/L (1N),
* Abnormality in any of the hematology parameters,
* Positive results at any of the serologies (HBs antigen, HCV antibodies, HIV 1 \& 2 antibodies) performed at V1,
* Positive result for β-HCG at any measurements (i.e. β-HCG \> 5 mIU/mL),
* Abnormality in the baseline EKG,
* Connective tissue disorder,
* Porphyria,
* Otosclerosis,
* Abnormality at the medical examination performed at V1 which included a neurological examination,
* Past history or clinical evidence of any malignant tumor or benign disease of the breasts or uterus or ovary (including endometriosis, leiomyomas, polycystic ovaries ...),
* Vaginal infection at the vaginal bacteriological examination performed at V1. After protocol amendment during the course of the study, infection diagnosed at the vaginal bacteriology or at the cervico-vaginal smear was removed from the exclusion criteria list.
* Hysterectomy, even partial, or endometrectomy,
* Pregnancy,
* Childbirth, breast-feeding, miscarriage or termination of pregnancy in the year prior to V1,