The respatialisation of reproduction from within to outside the body has made reproduction hypermobile, but it has also rendered reproductive tissues hyper-visible at the most intimate scales of resolution. This chapter overviews the respatialisation of reproduction with which the author opened: from intoex vivo. It turns to the detection of embryonic abnormality in vitro, and to the importance of gene maps in genetic screening. The chapter queries how the knowledge generated by preimplantation genetic tests s is instrumentalised-used to understand and order human life. While a primary focus in the fertility clinic, in reproductive medicine and in biomedical research, abnormal embryos have garnered scant attention beyond the life sciences. The chapter aims to contest the idea that embryonic abnormality is a pre-given, biological category. Like cancer, skin or blood cells, embryos are a source of regenerative genetic material with significant biovalue.