My Neice Is 13/40 And Was Diagnosed With Haemochromatosis A

My neice is 13/40 and was diagnosed with haemochromatosis a few months ago Currently her Hb is 11.9 (she has been bled a couple of times her other results are Fe 39.6 H;transferrin 1.7 L; TIBC48; saturation99% H ferritin 73.
Is there a guideline for what is done in pregnancy She lives in Sydney Australia. Do the ostetricians deal with this themselves? She is worried re the effect on the fetus.