In principle, women have the right to autonomy over their bodies and informed consent. In practice however, some 'carers' do not respect this. The law is on their side - they can always play the 'it was medically necessary' line and in truth, few parents question this treatment in any case. Not just doing things without informed consent, but telling mothers they 'have' to be induced/have VEs/cannulas/etc, etc - it's pretty common really.
You have to do lots of research in your options & care providers. The surest way to be sure, is to actually build a relationship with them - so continuity with a known carer. Even if you go private and get to know your OB, you probably won't have the option to get to know your midwife (even *if* you can do 'shared care', you may not be caseloaded to a particular midwife and will have to labour with whoever happens to be there at the time).

