Determination of fertility interval with ovulation time estimation using differential skin surface temperature (DST) measurement

Temperature distributions over the breasts of five healthy, young female volunteers using non-pharmaceutical contraceptives were studied over a menstrual cycle to identify "dynamic" temperature points related to E2-induced vascularity and "static" temperature points reflecting the body's core temperature. Corresponding thermometric measurements were analyzed. It was shown during a preliminary study that the DST between a "dynamic" and "static" point, so located, provides advance information on ovulation timing independent of physiologic disturbances and circadian and ambient temperature changes.