Following a conversation in the comments, here are some further adoption resources:

ARMS (Association of Relinquishing Mothers)

Information on the process of making contact between a relinquished child and mother in NSW

Research on the relinquishing mothers' pain associated with the loss of their child

Adoption Research and Counselling Service (western australia?) ARCS Ph: (08) 9370 4914

Research on effects of adoption on adoptees:

Victorian Government services, including relinquishment counselling

A South Australian woman (also a relinquishing mother) who offers phone-counselling