Ovulite operates on the principle that saliva - when you are on the verge of ovulating - forms a "ferning" pattern when it dries. These fern-like patterns (which appear like frost on a windowpane) are easily observable through the Ovulite ocular lens which is capable of a 40X magnification. By observing changes in your saliva patterns, you can predict ovulation -with 98% accuracy. "Ferning" patterns (#3) indicate ovulation and peak fertility. Ovulite is FDA-registered and very easy to use. Ovulite consists of a small, cylindrical container about the size of a lipstick tube, a high-quality focalizable eyepiece, and a small slide where the saliva sample is placed and illuminated with an LED light when a button is pressed. Advantages of Ovulite include: ? Access to a toll-free helpline - 24 hours per day, 7 days per week. ? The only FDA-Registered Ferning Scope on the market! ? An unconditional money-back guarantee! ? A 98% accuracy! Easy-to-use with virtually no learning curve! ? Unlimited testing - completely re-usable! ? Comes with a free carrying case and a detailed instruction book.