Newborn genome sequencing isn’t science fiction anymore. It’s already changing which babies get diagnosed, when they get treated, and how many families spend years in diagnostic limbo.When our daughter Evie started missing her milestones, we spent five years bouncing between specialists, MRIs, EEGs, blood tests, microarrays and more—with no answers. It took whole exome sequencing to finally reveal a point mutation in SHANK3, now known as Phelan-McDermid syndrome. Our story is heartbreakingly common for families with genetic disorders—and the emotional and economic cost is huge. In this episode of GENEration Hope, I sit down with Dr. Wendy K. Chung—clinical and molecular geneticist, Chair of Pediatrics at Boston Children’s Hospital and Harvard Medical School, and Principal Investigator of the GUARDIAN newborn genome screening study. We talk about: • How whole-genome sequencing (gWGS) is changing newborn diagnosis • What the GUARDIAN study is finding in over 13,000 babies so far • Why Rett syndrome is far more common than we thought (around 1 in 1,500 girls) • The week she diagnosed a 72-year-old and a 3-week-old with Rett • The ethics of telling parents about serious conditions when babies still look “perfectly fine” • How families can “stand up and be counted” in registries so they’re not left out of future trials • Why early diagnosis is essential for gene-targeted therapies—and why timing may one day mean treating even before birth