You could have a hep lock in place during labor/pushing that wouldn't interfere with moving around during labor, but it would provide immediate access if you started bleeding heavily after baby was born.
Of course, the hematoligist can give you better answers regarding your exact diagnosis and the implications regarding labor and delivery, but it seems like from what you've said if they are aware of the issue beforehand and are prepared to be aggressive with any bleeding that isn't normal after delivery, hopefully that will be enough to keep you safe without interfering with the birth itself.
Of course, the hematoligist can give you better answers regarding your exact diagnosis and the implications regarding labor and delivery, but it seems like from what you've said if they are aware of the issue beforehand and are prepared to be aggressive with any bleeding that isn't normal after delivery, hopefully that will be enough to keep you safe without interfering with the birth itself.