32y old patient, candidate for frozen-thawed embryo transfer. Endometrium seemed resistant to estradiol validate, from 4 to 8 mg/day, and to estradiol patch, from 50 to 100 mug each 2 days.
In case of estradiol resistance, practically all of the interventions are not based on strong evidences. I will try adding low dose aspirin along with sildenafil vaginal cream