Efficacy of Daily 50 mg Intramuscular Progesterone for Luteal Phase Support in Frozen Embryo Transfer Cycles: Analysis of Serum Levels and Pregnancy Outcomes.

Although higher chemical and clinical pregnancy rates were observed in Q4 compared to other quartiles, these differences did not reach statistical significance among quartile groups (p = 0.15 for chemical pregnancy, p = 0.75 for clinical pregnancy) ( Table 2 ).

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