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Tag: FXS

Increased level of risk

Sheba Medical Centre recently published a study undertaken over three years by its department of obstetrics and gynecology in conjunction with Sheba Genetic Institute and the Genetics Institute in the Tel Aviv Sourasky Medical Centre, which found that women of Ashkenazi descent were twice as likely to have a baby born with Fragile X syndrome (FXS) compared to Jewish non-Ashkenazi women.

Nearly 600 female carriers of the FXS gene from various Jewish heritages participated in the study, which was published in the peer-reviewed publication Nature. Previously, it was known that only CGG repeats and AGG interruptions affect the risk for a child with FXS. This new research adds a third identifier, children of two Ashkenazi parents, allowing for better personalized genetic counselling for carriers who are trying to conceive.

FXS is the most common genetic cause of mental disability in an unborn child and causes intellectual disability, behavioural and learning challenges, and various physical characteristics. The prevalence of carriers in the Jewish population stands at about one in 150 women.

Dr. Noam Domniz of the IVF unit at Sheba Medical Centre said: “The new information from this study regarding the influence of ethnicity stresses the importance of providing more accurate and personally targeted genetic counseling to each woman, according to her personal level of risk. At Sheba, we aim to use this new approach to better evaluate each carrier’s risk level, empower them to make informed choices, leading to a clearer and safer road to motherhood.”

Posted on May 28, 2021May 27, 2021Author Sheba Medical CentreCategories IsraelTags Ashkenazi, Fragile X syndrome, FXS, genetics, Noam Domniz, science, Sheba Medical Centre, Sourasky Medical Centre, women
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