This research analyses the development of an Arduino-based vital signs monitoring system, designed to improve comprehensive care in obstetric psychoprophylaxis in Ecuador. Advanced sensors such as the MLX90614 to measure body temperature, and the MAX30102 for heart rate and oxygen saturation, integrated with Arduino Uno, were implemented. The programming was carried out in Arduino IDE, using specific libraries for the management of real-time data, which are displayed on an LCD screen. During testing, the system proved to be reliable, obtaining data comparable to standard medical devices, with variations of <2%. The system was evaluated in real situations, such as psychoprophylaxis workshops, showing that it can capture variations in vital signs efficiently, providing early warnings in critical cases. In addition, its low cost and portability are highlighted, making it accessible in communities with limited resources. The potential findings of this technology are to become a key tool for primary health care in Ecuador, not only in psychoprophylaxis but also in other medical areas. The use of open technology such as Arduino allows the adaptation of the system to various local needs, promoting innovation in the health sector.