Here's how it works: When you wake up in the morning, your saliva contains salts, which contain the info about where you are in your cycle when viewed under a microscope. So you place a dab of spit on the product's lens in the morning, let it dry, and look through the mini microscope. You'll see either dots, dots and fernlike patterns, or the fernlike patterns with no dots. That last one is the one that indicates ovulation, so you'll know you're at your peak time to conceive if you see it.
Science is neat!
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