[Jessica121706]

My chart has me estimated to o on monday but I have yet to have a positive opk...Which would you follow?

[Servilia]

The OPK.. the estimates given by charts are not written in store, they're really just estimates based on past cycles. If you have very regular cycles it's not a bad estimate but you can always have an off cycle right so better to use those OPKs. Good luck

[LifesGood]

I never used them myself. I use CM to determine when I am gearing up then just dtd every other day or more until after O is comfirmed.

I have seen some ladies O while using OPKs and never getting a +. Sometimes if you take it at a certain time of day every day you can miss it I guess. I would use everything in combination. But I wouldnt just wait for a + OPK before trying