The femSense System consists of a very precise temperature sensor embedded in an adhesive patch and the supporting app.

The sensor patch is worn underneath your arm. Once activated, the patch measures the body temperature continuously, 24/7, for up to 7 days .To work correctly, the patch should be read by your NFC-capable smart device at least once (1) a day. The app will ask you to read the patch twice (2) a day for optimal evaluation.femSense tells you when you are fertile and, based on the recorded temperature data, femSense can detect and confirm ovulation. Every month the app reminds you when to apply the patch, when to read the patch, and when you are fertile.

femSense reliably detects your ovulation and most fertile days using continuous temperature measurement and the well-known temperature method.

Based on your previous periods the femSense app can predict your fertile window, the days you are most likely to get pregnant. The femSense sensor patch measures your body temperature continuously, 24/7, during your fertile window to measure and confirm your ovulation. You are fertile in the days shortly before and immediately after ovulation.

The temperature sensor used in the femSense patches detects temperature differences smaller than 0.1°C and was specially designed to detect the postovulatory temperature rise, which is typically between 0.2°C-0.5°C.

In contrast to the basic basal temperature measurement method, the patch records a temperature value several times per hour. As the patch is always in the same position, measurement artifacts can be minimized. An independent Swiss statistics institute has confirmed that femSense is 99.73% accurate when predicting ovulation.