Often, this was not given at the time of adoption, and the father's history is usually little known even to the mother. Also, any children you have now, or in the future, will not have contact with the sibling who was adopted. Tann was insistent that it was best for everyone involved if birth records were sealed — even from the adoptees themselves.
In a broader sense, they felt it could be inferred that adopted children are always children, and thus second-class citizens subject to discrimination.
Always, she advocated that adoption records be sealed. Many adopted adults still retain this rocking behavior especially when tired.
More than reunions have occurred as a result of the program, many of those being the adoption-related cases. In the post WWII era, laws were enacted which prevented both the adopted person and adoptive family from accessing the original, and the information given to them can be quite limited though this has varied somewhat over the years, and from one agency to another.
Since males seldom change their surnames, and the mother might have additional information, it is usually easier than the initial search for the birth mother. In fact, Massachusetts was the first state to pass a law making adoption a legal process, in Feel free to contact me with any questions you have.