different brands work for some women and not for others. I hate Answer brand but for some women they are reliable. Some women never get one on a first response OPK, others that is their go-to for OPKs...
so it could be possible that they just don't work for you while other brands work just fine
(do not ask the science behind this, I don't know. I just assume its different manufacturing processes)
so it could be possible that they just don't work for you while other brands work just fine
(do not ask the science behind this, I don't know. I just assume its different manufacturing processes)