Also important to know is you can't have the injection which expuls your placenta quicker (syntocinin?) IF you want the cord to pulse...so be ready after the birth to say 'no' to it when (or if) they ask!
I wanted the cord to pulse and my midwife knew this but after the birth she trickily asked if I wanted the injection to which I replied 'why not' (not knowing one would stop the other)....so the cord was clamped