In my country you have to be lucky to adopt. In many cases you can adopt the child you want, but the economic power of the adopter always plays a role. That person will be the one who will be able to get the baby he or she wants.
I have a friend who adopted a baby, now he is an adult. He knows he is adopted and treats his adoptive mother well, but he knows she is not his birth mother and he will never know who she is. Because the adoptive mother did not know who gave him up.
He is a good boy but he has not completed in his life that uncertainty of not knowing why he was given to my friend.