Clearblue Digital Ovulation 10PkIn every cycle there are only a few days when a woman can conceive, so having sex on these days is very important if you are trying to get pregnant. The Clearblue Advanced Digital Ovulation Test is the first and ONLY test that typically identifies 4 or more fertile days each cycle. It tracks 2 key fertility hormones to identify your High AND Peak fertility days, so you can plan ahead and have more opportunities to get pregnant.