Katey;
Get your friend to get in touch with her union. They at least will be able to tell her exactly what her AWA (Australian Workplace Agreement) provides for pregnant women. Most AWAs provide some sort of protection.

She may be able to take other duties (reception, working on the changerooms or registers where she gets to sit down) and they can be made to provide a chair for her.

If she has no success with the union, (they are usually pretty successful) then get in contact with a lawyer.

Discrimination against pregnant women is rife. There are a number of recent cases in the Federal Magistrates' Court about discrimination against pregnant women. Your friend needs to stick up for herself.

Current affairs programs are also good for getting the word out about "bad" employers.

Let me know how you go (I'm a lawyer myself and interested in this area).

Regards;