Clearblue Advanced Fertility Monitor comprises an easy to use touch screen Monitor with simple urine tests and is proven to increase the chances of getting pregnant naturally by 89%*. By accurately tracking 2 key fertility hormones, estrogen and luteinising hormone (LH), it is designed to identify ALL your fertile days. It is also the ONLY Monitor that enables you to test for pregnancy from 3 days before your period is due. You can record when your period occurs and also when you have intercourse. The Monitor displays all your fertility information on a monthly calendar screen and there’s also a summary chart that shows you up to the last 6 cycles of key data. *In the first 2 cycles of use. Robinson JE., et al. Fertility & Sterility (2007) 87: 329-334. Proven to increase the chances of getting pregnant naturally by 89%* *In the first 2 cycles of use. Robinson JE., et al. Fertility & Sterility (2007) 87: 329-334.. Tracks 2 key fertility hormones - designed to detect ALL your fertile days. Designed to detect more fertile days than any ovulation test so you have more opportunities to get pregnant naturally. The ONLY monitor to count down and enable you to test for pregnancy from 3 days before your period is due.* *In clinical testing with early pregnancy samples gave the following results: 74% of women received a 'Pregnant’ result 3 days early, 91% of women 2 days early and 96% of women 1 day early.. Record days when your period occurs and when you have sex - see all your personal information on the calendar. Compare past cycle data on the cycle summary & see your unique pattern of fertility developing. New discreet, feminine design with clear, touch-screen display and easy test-stick insertion. 99% accurate at detecting the LH surge and over 99% accurate at detecting pregnancy from the day your period is due..