I was skeptical when I first bought the monitor but not I'm telling all of my friends ttc to buy it!!! I had an IUD for a little less than a year when we decided to try for our first baby. I didn't buy the monitor the first month because my period was so messed up from the IUD. However about month after having it removed I purchased the monitor. The first month I got a high on day 19, peak on 20th and 21st and high on the 22nd. The second month I went straight to peak on day 13, peak on day 14 and high on day 15. I tested on 10 dpo and got a faint BFP!!!!! I went to the doctor for a blood test on day 11 and on day 12 it was confirmed... we're pregnant!!! We're pryaing that this is a sticky bean! If you're trying to decide whether or not to buy the monitor... BUY IT! You'll be so happy that you did!!! I have suffered from ovarian cysts since I was a teenager and I this monitor really helped distinguish cyst pain and ovulation pain. However, I must tell you that on the second month we did use Preseed, which obviously made a big difference. Both products are aweosme! Good luck!! Get more detail about Clearblue Easy Fertility Monitor.