We had ivf with pgs and 5d blastocyst. when our embryo was 6w4d, we saw 13mm empty gs w/o yolk sac and fetal pole. hcg doubling. how likely is it bo?

May be too early...: .... to tell how well your early pregnancy is going. Generally, with a singleton non-IVF intrauterine pregnancy, the embryonic developmental milestones are known and there are sonographic criteria to diagnose a failed or failing pregnancy that may not apply to all IVF pregnancies. Usually, diagnosis of a failed pregnancy will be made if the mean gestational sac diam.is >25 mm and no embryo is seen