Today, over 90% of the embryo biopsies that are performed for a PGD procedure are done on day 5, which makes it impossible for embryos to be transferred on day 3. In any case, when the biopsy is carried out on day 3, the result won't be available until day 5, so the embryos will be transferred on day 5 anyway.
Read the full article on: Day 5 vs. Day 3 Embryo Transfer – What Are the Pros & Cons? ( 69).

Emilio Gómez Sánchez
B.Sc., Ph.D.
Bachelor's Degree in Biology from the University of Seville. PhD in Biology from the University of Valencia. Large experience as an Embryologist Specialized in Assisted Reproduction. Currently, he is the IVF Lab Director of Tahe Fertilidad.
License: 14075-MU