Originally Posted by
ksmom
Fertility Friend probably counts the O+1 attempts because even though it's good at detecting O, it's not an exact science. It could still be off by 2-3 days either way. So what someone thinks is a pregnancy resulting from O+1, probably O'ed a day or two off from what FF detected.
Some people do get fertile cm for a day or two after O. I usually get it. I think it takes a while to dry up. You could be experiencing a false surge where your body gears up for O then decides against it. Only way to know for sure is through temps or ultrasound. If you always have watery cm, you'll probably just have more of it or have it change to ewcm around O time.