oral dose of ethinylestradiol 0.03 mg + levonorgestrel 0.15 mg per day during 11 weeks

Oral placebo capsule daily during 11 weeks

Neovletta

A modified dictator game will be used to measure altruistic behavior (Eckel and Grossman 1996). Each subject decides how to allocate money between herself and a charitable organisation. The size of the donation is our measure of altruism. Risk aversion is measured by a test where the subject makes several choices between a certain payoff and a 50/50 gamble to win a certain amount of money (Dohmen et al 2005). Competitiveness is defined as the extent to which women choose to compete in a task which involves solving as many simple mathematical exercises as possible during three minutes (Niederle and Vesterlund 2007).

Sexual function will be assessed by the validated instruments Sexual Activity Log (SAL) (Derogatis et al 2004), Profile of Female Sexual Function (PFSF) (McHorney et al 2004, Derogatis et al 2004) and Personal Distress Scale (PDS, past 30 days) (Derogatis et al 2004, Leiblum et al 2006). The women are answering the questionnaires, which are all computerized, at the Women´s Health Research Unit.

Mood and health-related quality of life will be assessed by the Beck Depression Inventory (BDI) test (Lightfoot and Oliver 1985) and the Psychological General Well-Being Index (PGWB) (Dupuy 1984, Wiklund et al 1992).