Comparing the outcomes of in-vitro fertilization in patients receiving vaginal, subcutaneous, and intramuscular progesterone for luteal phase support: a three-armed randomized controlled trial.

However, although the intramuscular group exhibited a higher rate of clinical pregnancies (32.4%) compared to the vaginal and subcutaneous groups (23.0% and 21.6%, respectively), this difference did not reach statistical significance ( p = 0.148).

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