Where to purchase ovulating kits

Carla
So I've never bought any kind of ovulating kits or strips or anything like that. where can I purchase some and what brand is more reliable... I have been married for almost two years (2 years in Jan) and haven't been able to conceive since we've gotten married we both went to a fertility DR and got the works and he suggested to use and ovulating kit... Any suggestions?? THANK YOU!!!