IVF success is a higher chance depending on the diagnosis. I'd check your RE's SART rates to see what their success is. For me, I only am concerned with the pregnancy % rates as its never happened for me and I'd at least like to get that far. Second opinions are always a good idea when in doubt. Just ask what type of protocol they'd recommend (like what medications, supplements, tests beforehand) to get something to compare to your current RE.
Best of luck!!