International survey to assess women's attitudes regarding choice of daily versus nondaily female hormonal contraception.

Background: The availability of reliable contraception tailored to suit women's needs and lifestyles is an essential step in addressing unintended pregnancy and its substantial human and financial costs. The daily combined oral contraceptive pill has been the short-acting hormonal contraceptive of choice for the last 50 years. However, for some women, this may be neither suitable nor optimal.

Efficacy and tolerability of a monophasic combined oral contraceptive containing nomegestrol acetate and 17β-oestradiol in a 24/4 regimen, in comparison to an oral contraceptive containing ethinylestradiol and drospirenone in a 21/7 regimen.

Objectives: The primary objective was to assess the efficacy, cycle control and tolerability of a monophasic combined oral contraceptive (COC) containing nomegestrol acetate (NOMAC) and 17β-oestradiol (E2). Effects on acne were evaluated as a secondary objective. Results were compared to those of a COC containing drospirenone (DRSP) and ethinylestradiol (EE).