Comparison of Pregnancy Outcomes in Ovulatory Frozen Transfer Cycles With or Without Trigger and Non-Ovulatory FET Cycles: A Retrospective Study

Ovulatory FET cycles, whether triggered or not, result in significantly higher ongoing pregnancy rates and lower miscarriage rates compared to non-ovulatory cycles. These findings support the preservation of the natural ovulatory process, either through spontaneous or induced ovulation, as a key factor in improving clinical outcomes in assisted reproductive technologies. The study highlights the potential advantages of modified natural cycles over artificial cycles that rely solely on exogenous hormone supplementation.