An intra-uterine monitoring system is described. The system comprises an implantable sensor device, shaped and dimensioned for implantation in a uterus for measuring conditions within the uterus to generate sensor data, and a wearable receiver device, for wirelessly receiving the sensor data generated by the implantable sensor device. In this way, real-time, in-vivo monitoring of the intra-uterine environment can be performed. The implantable sensor device can be kept small and simple, requiring only the mechanical and electronic structures necessary to take sensor measurements and transmit those to the receiver device. By making the receiver device wearable, it can be kept in relatively close proximity to the implantable sensor device on a long-term basis, making regular monitoring viable.
