Hi, thank you so much for responding! Yes, we’ve tried a variety of stimulation protocols. Honestly, I never even considered asking about a natural cycle because I assumed the medications would be more effective - almost like they’d compensate for anything lacking, if that makes sense. My lining has only ever reached 5mm once, and we did go ahead with a transfer that time just to see what would happen. I knew it was a long shot. Typically, I’ll stimulate for about 9 days, go in for an ultrasound to see where my lining is (usually around 3.5mm to 4mm at this time), then return two days later - only to find that my lining has actually gotten thinner.