I have noticed that people on hear have been saying that this year the changes to medicare mean that rebates to obstetric services will be capped at $300. But that is not true the following quote has been taken from the website listed :
"Over a standard course of maternity care, the base MBS rebates have been increased by about $300 per patient. This means patients will now receive a higher rebate before they qualify for the Extended Medicare Safety Net (EMSN)."
As it says rebates have been increased by $300 which means you will get more back not less. I hope this helps.