Inclusion Criteria:  Indication for IVF Wish to perform NC-IVF Regular menstruation cycles (26-32 days) Orthotopic localization of ovaries Age 18-42 Written informed consent  Exclusion Criteria:  Endometrioses III°-IV° ≥ 3 embryo transfers in previous IVF therapies without pregnancy Contraindications or allergies against study medications < 18 and > 42 years of age Known or suspected non-compliance Inability of the participant to follow the procedures of the study, e.g. due to language problems, psychological disorders, dementia, etc. Participation in another study with investigational drug within the 30 days preceding and during the present study Previous enrolment into the current study Enrolment of the investigators, their family members, employees and other dependent persons