For use with the Clearblue Fertility Monitor, the Clearblue Fertility Monitor Test Stick pack includes 30 individually wrapped test sticks. The majority of women who are trying to get pregnant will need 10 test sticks each cycle. Women with irregular or long cycles may have to use 20 test sticks each cycle. The Clearblue Fertility Monitor comes from the #1 OB-GYN ovulation recommended brand*** and is proven to increase the chances of getting pregnant by 82% in the first cycle of use*. It's designed to identify all your fertile days**, typically up to 6, which is more days than traditional ovulation predictor kits. This discrete, feminine, handheld fertility monitor tracks two key fertility hormones, estrogen and luteinizing hormone, it shows your fertility information on the easy to use touch screen as well as summarizing up to 6 cycles data on one screen for easy comparison.