Bethany,
You may have read some of my posts re opk's? If so, I will bore you, if not I may make you feel better!
I have NEVER got a positive. The closest is a shade or two lighter than the control. I do ovulate as I have been pregnant 6 times. I have used lots of brands and lullabuy over the internet is the easiest for me as I get a 'close to positive' . I got this in my last cycle that I did conceive in.
I can't comment on maybe baby as I haven't used them.
Love Deb