Posted at 15:42h
Preimplantation genetic screening, or PGS, is a viable option for certain IVF patients. Available, for an additional fee, to IVF couples anxious about the chromosomal health of their embryos, PGS takes place before your embryo transfer
(and delays it until the results are back). Due to its pre-transfer timing, it has to be better than chorionic villus sampling or an amniocentesis
, which look for fetal problems several weeks into a pregnancy.