Background: A low progesterone level on the embryo transfer (ET) day significantly reduces the pregnancy rate. Therefore, the present study aims to investigate the effect of adding daily 50 mg intramuscular progesterone to a total of 800 mg progesterone suppository on the fertilization (IVF) success rate in women with low progesterone levels.
Materials And Methods: This parallel open-label clinical trial was performed on 218 IVF candidate infertile women who had <9.