i am doing the graduate dipolma of midwifery after my b nursing.
i suggest you do biology and pdhpe, and maybe chemistry. i found that these subjects (which i did for the hsc) have helped me greatly.
i also suggest doing the bachelor of nursing first (which is what i am doing)
it is far easier this way, and also, if you get bored of midwifery, you have another qualification to fall back on. it is only 1 extra year once you have become a registered nurse. if you become a midwife and later decide you want to do nursing, you will then need to spend another 3 years at uni studying nursing.
so do bio, chem and pe for the hsc and do nursing first!
last years cut off was around 83 just to do midwifery, while nursing was 71 (at UTS)
i do not think that these will change much over the next few years