Facts About Pre-implantation Genetic Screening (PGS)
By Chioma Umeha Everyone considering IVF should be aware of PGS, and those in the following circumstances should be particularly aware: women who have attempted IVF without becoming pregnant more than once, women who have experienced recurrent miscarriages or have had a pregnancy involving a chromosomal abnormality, and women with diminished ovarian reserve (since a high proportion of their eggs are often chromosomally abnormal). All embryos do not develop to the blastocyst stage, and generally only some of those that do will be identied as chromosomally normal. Regardless of the number of blastocyst stage embryos produced, there is always a risk that none will be identied as chromosomally normal once subjected to PGS. Should this occur, a transfer will not take place. Women who produce few eggs in a single IVF cycle may engage in a process referred to as “embryo banking”. In an effort to accumulate a more plentiful number of embryos for PGS analysis, their d