Comparison of Individualized Rescue Luteal Phase Support Strategies with Vaginal and Combined Vaginal & Subcutaneous Progesterone Administration in Artificial Frozen-Thawed Blastocyst Embryo Transfer Cycles Based on Serum Progesterone levels - Arik Alpcetin, Secil Irem; Ince, Onur; Akcay, Bengisu; Cevher Akdulum, Munire Funda; Demirdag, Erhan; Erdem, Ahmet; Erdem, Mehmet (Frontiers in Endocrinology, 2025)