You can study by correspondance through University of SA. Have a look on their website University of South Australia - quality university study and education in Australia and you can find more info there. You do need to travel to Adelaide a couple of times a year for workshops though and obviously you have your placements to do. I think they try to get you a placement near your home, but if they cant then you have to travel to SA for your placement. I think its the only uni where you can do an undergrad bachelor of midwifery by correspodance.