Abstract: An electronic system for determining a time of the temperature nadir of a female human during the menstrual cycle comprises a wearable device (1) that includes a first sensor system (104), configured to determine a temperature of the female human, and a second sensor system (101, 102, 103), configured to determine one or more further physiological parameters of the female human. The electronic system further comprises a processor (13, 30, 40), configured to determine a detected starting point of the fertility phase of the female human, using the one or more further physiological parameters of the female human. The processor (13, 30, 40) is further configured to detect the temperature nadir as a temporary decrease in the temperature, using the detected starting point of the fertility phase of the female human. The time of the temperature nadir is used as an indicator of the time of ovulation and peak oestrogen level.

Abstract: An electronic system for non-invasive monitoring of estrogen of a female human comprises a wearable device and a processor. The wearable device includes a first sensor system configured to be worn in contact with the skin of the female human and to determine a level of perfusion of the female human. The processor is configured to receive and store the level of perfusion of the female human from the first sensor system for a respective point in time. The processor is further configured to determine a change in the level of perfusion of the female human, using the levels of perfusion of the female human stored for a plurality of respective points in time. Furthermore, the processor is configured to detect a change in estrogen level of the female human based on the change in the level of perfusion of the female human.

Abstract: An electronic system for non-invasive monitoring of estrogen of a female human comprises a wearable device (1) and a processor (13, 30, 40). The wearable device (1) includes a first sensor system (101) configured to be worn in contact with the skin of the female human and to determine a level of perfusion of the female human. The processor (13, 30, 40) is configured to receive and store the level of perfusion of the female human from the first sensor system (101) for a respective point in time. The processor (13, 30, 40) is further configured to determine a change in the level of perfusion of the female human, using the levels of perfusion of the female human stored for a plurality of respective points in time. Furthermore, the processor (13, 30, 40) is configured to detect a change in estrogen level of the female human based on the change in the level of perfusion of the female human.

Abstract: An electronic system for non-invasive monitoring of estrogen of a female human comprises a wearable device (1) and a processor (13, 30, 40). The wearable device (1) includes a first sensor system (101) configured to be worn in contact with the skin of the female human and to determine a level of perfusion of the female human. The processor (13, 30, 40) is configured to receive and store the level of perfusion of the female human from the first sensor system (101) for a respective point in time. The processor (13, 30, 40) is further configured to determine a change in the level of perfusion of the female human, using the levels of perfusion of the female human stored for a plurality of respective points in time. Furthermore, the processor (13, 30, 40) is configured to detect a change in estrogen level of the female human based on the change in the level of perfusion of the female human.

Abstract: An electronic system for determining a time of the temperature nadir of a female human during the menstrual cycle comprises a wearable device (1) that includes a first sensor system (104), configured to determine a temperature of the female human, and a second sensor system (101, 102, 103), configured to determine one or more further physiological parameters of the female human. The electronic system further comprises a processor (13, 30, 40), configured to determine a detected starting point of the fertility phase of the female human, using the one or more further physiological parameters of the female human. The processor (13, 30, 40) is further configured to detect the temperature nadir as a temporary decrease in the temperature, using the detected starting point of the fertility phase of the female human. The time of the temperature nadir is used as an indicator of the time of ovulation and peak oestrogen level.