|Embryo chromosome screening should not be offered to women to improve their chances of getting pregnant through in-vitro fertilisation, according to the British Fertility Society (BFS).
Preimplantation genetic screening (PGS) is used to assess which embryos are most likely to come to term in women aged over 35 who are undergoing IVF, and those who have suffered IVF failures or repeated miscarriages.
The technique takes a single cell from the multiple embryos created outside the body and checks it for genetic abnormalities called aneuploidies, which involve missing or an extra pair of chromosomes.
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