Intramuscular progesterone versus 8% Crinone vaginal gel for luteal phase support for day 3 cryopreserved embryo transfer

We observed that day 3 CET cycles with 8% Crinone luteal support had a 44% and 49% lower odds of clinical pregnancy and live birth, respectively, compared with those with IMP support. Further studies are required to identify the optimal timing and dose of 8% Crinone vaginal gel for use in CET cycles.