Hi, I have been trying to conceive for a long time, I used to buy those ovulation testers in Watsons, cost a fortune. A few months ago, on a trip to China I have found that David ovulation testers selling in the local drug store, much much cheaper, I bought one box of 100pcs, only cost a few hundreds dollars. If anyone want some, I can share with them, just send me a PM. I guess it will take me a long time to finish the 100pcs.