I swear by the lady comp! I used it for years to not get pregnant, and on the day it has me ovulating we went for it anyway and have a now 4 year old. We tried again later and have our now 2 year old. I got a new one and it has been upgraded to a baby comp. It tells you when you ovulste, when you are fertile up to ovulation and has a possible gender predictor. We are trying it out for a girl now!