AI ultrasound cleared
An AI tool from Butterfly Network won FDA clearance to estimate gestational age in minutes, based on training on more than 21 million images. The device is intended for pregnancies between 16 and 37 weeks and performs a single, measurable task within an imaging workflow. This clearance illustrates regulators approving narrow, well‑defined AI tasks rather than broad health assistants. (diagnosticimaging.com)
Ultrasound works by sending sound waves into the body and turning the echoes into images. Butterfly Network now has United States Food and Drug Administration clearance for an artificial intelligence tool that uses those scans to estimate how far along a pregnancy is. (butterflynetwork.com) The clearance, announced March 30, 2026, covers Butterfly’s fully automated Gestational Age tool inside its handheld ultrasound system. The company said it is the first Food and Drug Administration-cleared blind-sweep ultrasound artificial intelligence tool for estimating gestational age. (butterflynetwork.com) A blind sweep is a standardized pass of the probe across the abdomen, rather than a sonographer stopping to capture and measure specific fetal images. Butterfly said the tool gives an estimate in under two minutes after a three-step process: enter fundal height, apply gel, and perform guided sweeps. (med.unc.edu) The cleared use is narrow. Diagnostic Imaging reported the device received 510(k) clearance for automated fetal age assessment between 16 and 37 weeks of pregnancy, and Butterfly said the model was trained on more than 21 million images. (diagnosticimaging.com) That narrow scope fits how regulators describe the category. The Food and Drug Administration says its public list covers artificial intelligence-enabled devices that have met premarket requirements for a device’s intended use, with review focused on safety and effectiveness for that specific function. (fda.gov) Butterfly said the model’s results are equivalent to sonographer-performed, biometry-based gestational age assessments in patients between 16 and 37 weeks. The company also said the tool is designed to remove the need for image capture, interpretation, or fetal biometric measurements by the user. (butterflynetwork.com) The technology did not start at Butterfly. The University of North Carolina at Chapel Hill said physicians Jeffrey Stringer, Ben Pokaprakarn, and Juan Prieto developed the method, and the university licensed it to Butterfly for use on its platform. (med.unc.edu) University of North Carolina said the underlying system had already been used in research across 12 countries before this clearance. Butterfly said the United States need is also concrete: nearly half of rural counties lack hospital obstetric services. (med.unc.edu, butterflynetwork.com) The result is not a general-purpose pregnancy assistant. It is a cleared tool for one measurable job inside an imaging workflow: turning a short ultrasound sweep into a gestational age estimate fast enough to use at the bedside. (fda.gov, diagnosticimaging.com)
