Pre-genetic Screening

PGS involves checking the chromosomes of embryos conceived by AMSor ICSI for common abnormalities. Chromosomal abnormalities are a major cause of the failure of embryos to implant, and of miscarriages.

Is PGS for me?
Recommended if:
  • you are over 35 and have a higher risk of having a baby with a chromosome problem (such as Down’s syndrome)
  • you have a family history of chromosome problems
  • you have a history of recurrent miscarriages
  • you have had several unsuccessful cycles of AMSwhere embryos have been transferred, or
  • your sperm are known to be at high risk of having chromosome problems.

How does PGS work?

The procedure for PGS is usually as follows:

Step 1. You undergo normal AMS or ICSI treatment to collect and fertilise your eggs
Step 2. The embryo is grown in the laboratory for two to three days until the cells have divided and the embryo consists of about eight cells.
Step 3. A trained embryologist removes one or two of the cells (blastomeres) from the embryo.
Step 4. The chromosomes are examined to see whether they are normal.
Step 5. One, two or three of the embryos with normal chromosomes are transferred to the womb.