Yes, Pregnancy is viewed as a pre-existing medical condition and many benefits are available to expectant mothers. See here for details.
Your due date plays an important role in whether you can get cover or not.
You are covered up to 26 weeks in the case of a single baby, and 19 weeks in the case of a multiple pregnancy.
Cover is provided to you, but not provided for childbirth or the health of a newborn child.
For full details see the PDS
For extended cover while pregnant overseas, we offer an additional product called our Pregnancy Pack.