There are those who are adopted who do not wish to find their birth mother after being adopted.
My brother was a foundling. He was left on a hospital door step when 2 days old. There were no identifying marks on him or the clothes he was wearing.
My parents adopted him and he is as much a part of our family as myself and my sisters.
Victoria changed its laws quite a few years ago to allow adoptees to find out their birth parents if said parents were willing.
My brother does not wish to know. He says he was abandoned by his mother and has no wish to find her. Unless she came forward with date and time of my brother's leaving it is not possible to find her.
My brother was left in 1968. It is surmised that she was very young and had lots of pressure to give up the baby. My parents have told my brother that his mother probably had no real choice due to the times and the circumstances. I am very glad he was not aborted.
Adoption always seems to be to be preferable to abortion in almost all cases.