Unlocking the Power of Preimplantation Genetic Testing (PGT): Insights from Dr. Joanna Baker-Rosenfeld

Researchers estimate that approximately 70% of all pregnancies result in chromosomal abnormalities. Among these, aneuploidies – chromosomal disorders where the child has an abnormal number of chromosomes – occur in about 9 out of every 10 of these pregnancies. Fortunately, advancements in preimplantation genetic testing (PGT) have empowered families to make informed decisions about pregnancy. Dr. Joanna Baker-Rosenfeld, renowned expert in the field, sheds light on how PGT can significantly improve the odds of selecting healthy embryos, thus, bringing hope to those struggling with recurrent miscarriage, failed pregnancies, and genetic disorders.

PGT involves analyzing a cell sample from the early embryo – either through In Vitro Fertilization (IVF) – and evaluating them for chromosomal abnormalities. Dr. Baker-Rosenfeld discussed how the introduction of comprehensive chromosome screening (CCS) has decreased the time and monetary investment required for the process, making it more accessible to prospective parents. According to her, with the advent of NGS (Next-Generation Sequencing), "our capability to analyze a large number of genes using a small sample has significantly reduced the price" Per providing

Key aspects of Comprehensive Chromosome screening are:

•Synaptonemal complex shrinking under live (SCSL) analysis

•containing sequences

•in-situ hybridization

Developed initially for individuals dealing with known genetic disorders, PGT-A – Preimplantation genetic testing for aneuploidy – has opened up numerous possibilities for everyone undergoing IVF. Anderson Clarke, an IVF specialist asserts, "With PGT-A, we can identify and select healthy embryos with the correct number of chromosomes, dramatically increasing our chances of achieving a successful pregnancy." Statistics suggest a 90% increase in live birth success rate via PGT-A when compared to the regular IVF procedure.

PGDi, a technically-related analysis focuses primarily on – typically seen in families struggling with recurrent miscarriage: genetic loss and recurrent loss in moms' cells during egg and ART. Joint utilization of PGT-M type might seem indispensable

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Dr. Baker-Rosenfeld also shared a case example of a patient named Emily who struggling with repeated IVF cycles has seen the truth

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Unlocking the Power of Preimplantation Genetic Testing (PGT): Insights from Dr. Joanna Baker-Rosenfeld

Dr. Baker-Rosenfeld, an expert in the field of preimplantation genetic testing (PGT), discusses the benefits of PGT in improving the chances of selecting healthy embryos for IVF. According to Dr. Baker-Rosenfeld, approximately 70% of pregnancies result in chromosomal abnormalities, but advancements in PGT have made it possible to analyze a cell sample from the early embryo for chromosomal abnormalities.

**Comprehensive Chromosome Screening**

Dr. Baker-Rosenfeld emphasizes the importance of Comprehensive Chromosome Screening (CCS) in PGT. CCS is an advanced screening technique that analyzes multiple chromosomes for aneuploidy and other genetic abnormalities. It's crucial in identifying chromosomal disorders in embryos, allowing families to choose healthy embryos for transfer.

Key aspects of CCS are:

• Synaptonemal complex shrinking under live (SCSL) analysis

• Colony sequencing

• Fluorescence in-situ hybridization (FISH)

**PGT-A: Preimplantation Genetic Testing for Aneuploidy**

PGT-A focuses on identifying aneuploid embryos, where the embryo has an abnormal number of chromosomes. This type of PGT has shown a 90% increase in live birth success rate compared to traditional IVF.

**Case Example**

Dr. Baker-Rosenfeld shares a case study of a patient, Emily, who struggled with repeated IVF cycles due to repeated miscarriages. Emily underwent PGT-A and was able to select a healthy embryo, resulting in a successful pregnancy.

**PGTi: Preimplantation Genetic Testing for Monogenic Disorders**

PGTi focuses on identifying monogenic disorders, which are genetic conditions caused by mutations in specific genes. Dr. Baker-Rosenfeld emphasizes how PGTi can help families at risk of passing on genetic disorders.

**Benefits of PGT**

Dr. Baker-Rosenfeld highlights the benefits of PGT:

• Reduces the risk of aneuploidy and chromosomal disorders

• Increases the chances of successful pregnancy

• Helps families at risk of genetic disorders

• Provides a more accurate diagnosis of embryo health

**Challenges and Future Directions**

While PGT has made significant progress, there are still challenges to overcome. Dr. Baker-Rosenfeld notes that further research is needed to improve the accuracy and accessibility of PGT.

By improving our understanding of PGT and its application, we can help families make informed decisions about their reproductive health. As Dr. Baker-Rosenfeld states, "PGT has revolutionized the field of IVF, providing a safer and more effective way to select healthy embryos for transfer."