Oral Versus Vaginal Progesterone in the Luteal Support in Cryo-warmed Embryo Transfer Cycles

Patients will be randomly assigned during the treatment follow up, at the time of addition of progesterone to the regimen, following computerized random number generator in procedure, to one of the study groups. Patients will be aware of the allocated arm since the treatment drugs have different route of administration. Group I will receive the oral dydrogesterone, while group II will receive the vaginal microprogesterone.