I did two fresh cycles and a frozen and got pregnant all three times. I miscarried the middle pregnancy (the frozen cycle) early on. My kids are now almost 8 and almost 5 1/2. My best advice is to avoid the temptation to over stimulate the ovaries. Don't try to get as many eggs as possible. Have a dr who can be controlled about it - we got about 20 eggs both fresh cycles and that was reasonable. I did get a slight case of hyper stim the second time and it isn't fun and can cancel your cycle, so it isn't worth pushing for more eggs and risking the chance at a fresh cycle.
My first cycle we transferred 2 3-day embryos. We believe both implanted, but by 8 weeks, there was only one. Full term healthy boy delivered by c-section. For the frozen cycle we had only one, it did implant, but by 8 weeks there was a sac but no baby. For the second fresh cycle they wanted me to go to blast with the embryo (5 days) but because of the hyper stim we ended up waiting 6 days. We transferred one embryo - a hatching embryo (cells were breaking out of the cell sac). Full term healthy girl delivered by c-section.