Preimplantation genetic diagnosis,  the genetic profiling of embryos prior to implantation, is recently applied to diagnose late-onset diseases and predisposition syndromes, however,  in predisposition syndromes outcomes are unclear.
Pre-implantation genetic diagnosis (PGD or PIGD) is the genetic profiling of embryos prior to implantation (as a form of embryo profiling), and sometimes even of oocytes prior to fertilization. A more recent application of PGD is to diagnose late-onset diseases and (cancer) predisposition syndromes. For example, in predisposition syndromes, such as BRCA mutations which predispose the individual to breast cancer, the outcomes are unclear. 
