Patent US 9,568,463

This disclosure provides a stand alone electronic device to predict a likely time of ovulation based on crystal formation in a mucous body fluid sample. Optionally body temperature data may also be measured and saved on the device memory. The device allows user to save the data, download images, and compare results from different times. The disclosure further provides a device that includes software using an algorithm to calculate frequency of crystals on the sample and allowing comparison of the frequencies. The algorithm may use the temperature data also. The device includes an option to transfer data onto a smart phone or similar device. The device is suitable for predicting ovulation of any mammal, including human beings, dogs and livestock including horses.