BioTech Social Media and Updates

From Prenatal DNA Test to $4B Cancer Detection Promise

1 in 11 babies born in America this year will be screened by a genetic test that didn't exist a decade ago. Biotech startup @BillionToOneInc turned a simple but radical idea—detecting rare fragments of fetal DNA in a mother's blood—into one of the most widely used prenatal tests in the U.S. And they're not stopping there. The same approach could unlock something even bigger: early-stage cancer detection from a blood test, a breakthrough that could one day save millions of lives. In this episode of Hard Tech, YC's Jared Friedman sits down with founders David Tsao (@dtsao) and Oguzhan Atay (@oatay) to hear how they went from half a lab bench to a $4B biotech company, and why they believe this is just the beginning of what their technology can do. 00:00 – Finding One Mutation in Billions 01:00 – Detecting Disease From a Blood Sample 02:10 – From Lab Idea to $4B Company 03:05 – The Breakthrough That Made It Possible 05:15 – Building the First Test From Scratch 07:30 – One Customer and a Sales Crisis 08:55 – Inside the Lab: How It Actually Works 12:10 – Detecting Cancer From Blood 13:50 – The Path to Early Cancer Detection 16:05 – Why Early Cancer Detection Is So Hard