Inclusion Criteria:  Women aged 25 to 45 years Unfulfilled desire to have children >1 year declaration of consent 20 kg/m² ≤ BMI ≤ 40 kg/m²  Exclusion Criteria:  Language barriers Previously known serious mental illness or cognitive impairment Patients with anatomical/organic damage and proven uterine abnormalities Eating disorders in the medical history Serious previous internal diseases Lack of internet access No consent to randomisation Participation in other studies