Lady-Comp uses the Fertility Tracker Method: a computer-assisted approach that evaluates basal body temperature, menstruation information and accumulated cycle history.

Basal body temperature and the cycle

Hormonal changes around ovulation are associated with a small rise in basal body temperature. Lady-Comp uses a sensitive sensor to take the measurement and an algorithm to evaluate the resulting pattern.

An algorithm refined over time

According to the manufacturer, the Lady-Comp algorithm has been developed and refined since 1986 and draws on more than 10 million evaluated cycles.

Understanding the 99.4% figure

A peer-reviewed evaluation reported that the algorithm correctly classified non-fertile days with 99.4% accuracy across approximately 107,000 cycles from 5,328 women.

This figure describes the algorithm's classification of non-fertile days. It is not a contraceptive effectiveness or pregnancy-prevention rate.

Read the manufacturer's accuracy information

Hardware and software together

Lady-Comp combines its temperature sensor, measurement process and algorithm in one dedicated device. Results are displayed on the device, so an app, subscription or cloud account is not required for everyday use.

Manufacturer background

Lady-Comp is manufactured by Valley Electronics. Product development brings together experience in fertility tracking, temperature measurement, software and device design.

Important information

Lady-Comp is intended to facilitate conception and track the menstrual cycle. It is not a replacement for contraception, does not protect against sexually transmitted infections and is not a medical thermometer.

This information is general and does not replace medical advice. If you have questions about your cycle, fertility, contraception or health, speak with a qualified healthcare professional and always follow the instructions supplied with the device.