Get into the swing of your cycle
Knowledge is power—and we’re here to help you be an ovulation expert
The pre-ovulation part of each person's cycle can vary, but the luteal phase (the part after ovulation) is rather consistent at two weeks. That's why understanding your cycle length is key for tracking ovulation.
If you already know how long your menstrual cycle is, you can use the tool below to determine the best time to start
If you don't know how long your cycle is, you can use the average cycle length of 28 days as a benchmark—that means you'd start testing on day 12, which is 11 days after the first day of your period.
Do one test per day over a five-day period, or until you detect an LH surge. Each box comes with nine test strips so if needed, you can start testing earlier to make sure you don't miss your fertile window.
When is day 1 of the menstrual cycle?
“Cycle day 1” is the first day of period bleeding. Your cycle length is from this day until the day before your next bleeding begins.
Find your testing start date
If your cycle length is...
...start testing on
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Timing is everything.
Leaving things to chance can be fun—but also inefficient. With over 99.9% accuracy, our Ovulation Tests predict when you’re about to ovulate. From there, you’ll know to get busy if you’re trying to conceive. Suspect you might not be ovulating? These strips can help you get a clearer picture so you know when to call up your doc.
P.S. Customers love our reusable, collapsible collection cup (sold separately).