Preimplantation diagnosis for single gene disorders

Area of Science:

• Reproductive Medicine
• Medical Genetics
• Embryology

Background:

• Preimplantation genetic diagnosis (PGD) is a technique used by individuals with genetic disorders to screen embryos before pregnancy.
• Advances in PGD technology and biopsy methods are continually refining its application.
• PGD can be combined with 24-chromosome aneuploidy screening for comprehensive embryo assessment.

Purpose of the Study:

• To review the evolving applications of PGD in reproductive medicine.
• To highlight unique uses of PGD, such as in Huntington disease and fragile X premutation testing.
• To discuss the ethical considerations surrounding PGD for single gene mutations.

Main Methods:

• Review of current PGD techniques and technological advancements.
• Analysis of specific PGD applications, including exclusion diagnosis and HLA matching.
• Examination of ethical debates related to PGD.

Main Results:

• PGD allows for the selection of unaffected embryos, potentially preventing the need for pregnancy termination.
• Unique applications include exclusion testing for Huntington disease, fragile X premutation screening, and HLA matching for stem cell donors.
• The use of PGD for single gene mutations raises significant ethical questions.

Conclusions:

• PGD is a powerful tool in reproductive genetics, offering reproductive choices to at-risk individuals.
• The expanding applications of PGD necessitate ongoing ethical discourse.
• Balancing technological capabilities with ethical considerations is crucial for responsible PGD implementation.