Ivf help! Thanks!

I did my first IVF attempt and now pregnant at 16 weeks. I didn’t have any grading but the embryologist will always ensure they transfer the best quality ones amongst. I believe mine that gotten transferred was a BB grade n the only one that made it through, the rest of the embryos didn’t make it to freezing quality. By the way, I did IVF in Australia, not Sg, I flew over.