Our situation, if it helps at all... We never did any genetic testing. Fresh cycle, transferred 2 perfect looking blasts, 1 took and is a healthy child. The other one obviously did not. Then proceeded to do elective single FETs to TTC #2. FET Try #1 with a perfect day 6 blast - negative. FET Try #2 with a pretty darn good looking day 6 blast - negative. FET Try #3 with a very average looking day 6 blast - success, perfect DC#2.
Good luck!