Stress Reactivity and Hormonal Contraception

Inclusion Criteria: * Women, who want to start using oral contraception (no hormonal contraception use for at least 4 months; regular menstrual cycle (between 25 and 35 days) prior to participation) * Women, who want to stop using oral contraception (OC pill use for at least 6 months; regular intake of OC pill) * Long-term oral contraception user (OC pill use for at least 6 months; regular intake of OC pill) * German language fluency * Normal or corrected vision * Body-mass index (BMI): 18-35 kg/m2 Exclusion Criteria: * Neurological or psychiatric disease * Medical problems such as hormonal, metabolic, or chronic diseases (e.g., severe hypertension, diabetes, or congestive heart failure) * Pregnancy, delivery, and lactation (current and within the last year) * Any kind of steroid hormonal, pharmacological treatment, or psychotropic treatment in the last three months * Shift work * Participants engaging in competitive sports * contraindication for MRI * People with non-removable metal objects on or in the body * Tattoos (if not MRI-incompatible according to expert guidelines) * Pathological hearing or increased sensitivity to loud noises * Claustrophobia * Surgery less than three months ago * Neurological disease or injury * Moderate or severe head injury * Intake of antidepressants or neuroleptics