Adjective
preimplantation (not comparable)
(medicine) Prior to implantation.
In addition to Tay–Sachs disease, preimplantation genetic diagnosis has been used to prevent cystic fibrosis and sickle cell anemia among other genetic disorders. citation * Mate selection. Source: Internet
In 1996, the first preimplantation genetic testing therapy for Marfan was conducted; citation in essence PGT means conducting a genetic testing on early stage IVF embryo cells and discarding those embryos affected by the Marfan mutation. Source: Internet
Jaenisch, R. and Mintz, B. (1974 ) Simian virus 40 DNA sequences in DNA of healthy adult mice derived from preimplantation blastocysts injected with viral DNA. Source: Internet