What is in your opinion the best IVF protocol for a 46 year old with FSH 19 and AMH 0.51, poor responder, 4 canceled IVF cycles turned into IUI because of dominant follicle and only 1 egg retrieval of 3 follicles that 2 were mature and fertilized but both arrested at day 4? Have tried strogen priming with Gonal f and clomid, strogen priming and clomid alone, letrozol and Gonal f alone with the latter achieving growth of 4 follicles and egg retrieval. Thank you!!!