Scientists have created a stick-on ultrasound device called UPatch that continuously monitors a baby's health in the womb, addressing limitations of current methods. Developed by a team led by Professor Sheng Xu at Stanford University, it provides real-time imaging and blood flow monitoring, potentially improving prenatal care. Trials show it can reliably track fetal health, with implications for safer pregnancies and broader access to care in underserved areas. However, it remains a proof-of-concept and requires further development.