In this episode host Matt Burgess speaks with Canadian genetic counsellor Erica Pai about pre‑implantation genetic testing (PGT). They discuss how PGT has evolved, technical and ethical challenges (including difficult genes like CYP21A2), the continuing role of linkage analysis in embryo testing, and the complexities of mosaic and segmental results.   They also cover the emotional and practical aspects of counselling families through IVF and PGT, issues of access and equity, and the importance of clinical support when deciding whether to pursue testing.