Early pregnancy factor

Anyone heard of early pregnancy factor as a possible cause for preg symptoms even before implantation? Just been reading up on it as I'm half way thru the tww and like every other month I'm hoping this is the one. I never really get any symptoms but have a few this time (slight nausea, frequent urination, increased salivation, hiccups, gassy). Apparantly EPF is released a few hours after fertilisation, so could be responsible for v early symptoms.