Ovulation Detection by Monitoring Temperature During Sleep

It is demonstrated that the temperature rise associated with ovulation in women can be detected by monitoring the body temperature noninvasively throughout the night. Digital recordings of the temperature were taken every 6 min during sleeping hours. It took 2-3 h for the temperature to rise and stabilize. Following this period, gradual temperature changes and abrupt fluctuations of about 0.60C (peak-to-peak) were observed. In spite of these changes, the average nightly temperatures clearly exhibited the rise of about 0.50C which normally follows ovulation.