The estrogenic component of estro-progestin (EP) is responsible for a negative impact on the metabolic and lipid assessment in women with polycystic ovary syndrome (PCOS).

The objective of this study is to compare the effects of a long term administration of two EP combinations, containing the same progestin (3 mg drospirenone) and a different dose of ethinyl-estradiol (EE) (20 vs 30 μg ) on the clinical and endocrine-metabolic parameters in normal weight PCOS women. The investigators enrolled 30 patients, randomly allocated to group A (20 µg EE - 3 mg DRSP) and 15 to group B (30 µg EE - 3 mg DRSP). Hirsutism score evaluation, hormonal assays, oral glucose tolerance test, euglycaemic hyperinsulinaemic clamp and lipid profile were performed at baseline and after 6 and 12 months of therapy.

Inclusion Criteria:

• normal weight women with Polycystic ovary syndrome, diagnosed in accordance with Rotterdam Consensus Conference Criteria 2003.

Exclusion Criteria:

• pregnancy
• past history of cardiovascular disease, diabetes mellitus (or impaired glucose tolerance as determined by a standard 75 g oral glucose tolerance test), hypertension
• significant liver or renal impairment
• other hormonal dysfunction (hypothalamic, pituitary, thyroidal or adrenal causes for the clinical signs)
• neoplasms
• unstable mental illness