In Vitro Fertilization (IVF) Step by step part 12

Embryo biopsy

Preimplantation Genetic Testing – Aneuploidy (PGT-A)

Normal human cells contain 46 chromosomes located in the nucleus of the cell. Chromosomes carry the genetic information in the form of DNA. Every human being receives 23 chromosomes from each parent. If an error occurs leading to the egg or sperm having a missing or extra chromosome, the embryo created will also have a missing or extra chromosome. This condition is called aneuploidy. Most of the aneuploidies will not result in implantation of the embryo, but certain aneuploidies, such as trisomy 21, can implant and lead to Down’s syndrome. Some other common aneuploidies include trisomy 13, trisomy 18, and Klinefelter’s syndrome (XXY).

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