Dr Fertility website was easy to use and they sent out my Clearblue advanced digital ovulation sticks really quickly. They also included a personal handwritten note and a little charm. I was so touched by this - the little stalk charm lives in its bag under my pillow....! I really recommend the Clearblue advanced digital tests - you can't argue with the colour of the stripes like other ovulation strip tests.... this one has a smiley face (or not) which is doing its thing and that is that! Yes sometimes it takes ages to identify a fertile window - but sometimes it takes ages to come!! be aware I think if you're very dehydrated it can make a false result. I used BBT as well to confirm what was showing up. Ovulation usually occurs on one day and then you notice a spike in temp the next morning. I'm sure Dr Fertility sell BBT thermometers - if you don't have one - then buy one! Good news is although I would have ordered from Dr Fertility repeatedly I am now almost 12 weeks pregnant....with TWINS! Thank you Dr Fertility for helping me :)