Previous conventional stimulation has negative effect on following minimal stimulation
To further certify whether previous conventional IVF ovarian stimulation has effects on the following IVF treatments, all patients undergoing minimal stimulation in vitro fertilization (IVF) during January 1st, 2005 to December 31st, 2021 were considered inclusion into this study. Patients with no IVF treatment history was assigned to the First-time minimal stimulation group (FT group), consisting 6,177 cycles, 2,576 patients. Patients who had undergone previous conventional stimulation protocol IVF was assigned to the Previous-Conventional stimulation group (PC group), this group had a total of 8,022 cycles and 2,871 patients.
Table3. Basic characteristics in previous C-IVF group and Fist time minimal stimulation group