These are the worst tests I’ve ever used. I’ve used FRER, at home, premom, pregmate, and easy @ home prior and will never buy wondfo again. First off, I had to dip the stick at least 12-15 seconds in order for the test to get the liquid to the test window. Had many where I used the “recommended time” and the urine never made it to the window. They weren’t terrible for early detection BUT DO NOT USE FOR PROGRESSION! These stayed very faint for a week and freaked me out. Got clearblue and FRER to settle my nerves and they were fine and came up MUCH darker. I’ve seen a lot now where women say wondfo takes forever and I now have first hand experience! DO NOT recommend.