Abnormal fetal movement is a major concern during late-stage pregnancy due to its correlation with stillbirth. Yet monitoring still relies on subjective maternal perception and hospital scans, creating anxiety for mothers and pressure on overstretched healthcare systems. Research found most hospital assessments detect normal movements despite perceived abnormalities, revealing an opportunity to design for reassurance, reducing unnecessary clinical visits.

Rhea is a prescribed wearable fetal movement monitor. By comparing daily data against historic patterns unique to the baby, it aims to reduce uncertainty through passive monitoring and live visual feedback. Rhea is a proof-of-concept exploring how medical ultrasound could support a more continuous, human-centred approach to fetal movement monitoring while preserving maternal autonomy and integrates with existing healthcare systems.