basically what I am trying to get at is would you know without doing a VE that a woman is fully dilated and ready to push or not fully dilated although feels ready to push? And if so by what factors would make you know the difference between the 2?
Nappyaddict I think I can sort of answer this question for you. When it is time there are a number of other physiological changes that happen that can be observed, rather than felt for:
Changes to the Rhombus of Michalis
Anal pouting
The 'zone' - it's common to be in the 'zone' as labour happens, and once you reach transition this can stop. Transition is actually a brief period of respite before the pushing phase begins, and so sometimes the woman can seem to come out of a bit of a trance, ask for water / food, as a natural urge to prepare her body for the next bit. This is a good sign she's at 10cm, and if the urge to push comes after this then you can be relatively sure any cervical lip has gone.
All of these rely on the midwife having spent some time with this woman, and of course the woman having an active labour, in that it's easier to tell these things if she's not lying down on her back on a bed.
These signs aren't necessarily foolproof, but neither is a VE, as others have demonstrated from their stories a VE is only a snapshot of the cervix at a given time, and can change quickly.
Hope this helps.