Probably too late but I'll add it anyway ...

I think also with adoption and even fostering you have to be past post 12 months any trying to concieve treatment/IVF and pregnancy 'loss'. In our adoption case this was rule 10years ago - ttc for us that is (not a pg. loss or even any IVF -they ask you +++++ questions about your relationship).

Our son's mother had no father listed on birth records and it always bothered me someone would try to take him away if they found out later - social worker could never give us a definate answer but said unlikely ! They changed rules/laws all the time rectrospectively!

Also, apparently with guardian ship in NSW - grandparents and other relatives can also lodge applications in Family Court even in opposition to mother wishes and legal signing of guardianship documents(though in case of my cousin she had passed away and her ex was still a living S**T ).