Find your fertile days faster with our multipack of 15 Ovulation/LH tests. Users who pair ovulation tests with the Natural Cycles app can give the algorithm a helping hand as it gets to know your fertile window even better, giving you even more green days. (An average of 5% more green days.) This is useful for both planning and preventing pregnancy.
How do LH tests work?
These test strips look for a rise in the luteinizing hormone (LH) that suggests ovulation is likely to happen. LH peaks around 48 hours before ovulation indicating that ovulation is likely to happen soon - it does not confirm ovulation has happened. The use of LH tests does not impact the effectiveness of the Natural Cycles app, but it gives more precision for plan users and reduces red days for prevent users.