since i had never ever used them before and just came off BCP i bought the internet cheapie sticks and bought a package of 25 with 10 pregnancy tests, i have 7 left for next month, yeah i used a lot the first month cause i started checking from CD 8 on didnt get positive until CD16 so then i used four more on that day, what a waste! bottom line 25 is good, and since you know the date around which your chart is saying id say 25 is more than enough xx
also i'm in canada,, i us usmoms just google and it should come up, she ships from Canada, shes great.