While open adoption is becoming more common as we learn about healthier adoption practices and the importance of open adoption for adoptees, many recognize that open adoption is not always possible. This may be because of security issues or simply at the request of the birth parents. It may be too risky or harmful to the child to allow for any openness in adoption. There may also be situations where an open adoption is simply not possible for the time being or cases where adoptive parents would prefer a closed adoption for varying reasons. The benefits of such a decision will likely depend on the reasons for it.
Adoptive parents may be less likely to consider the possibility that they are doing something wrong, and blame the child's heredity. The parents may even unfavorably compare their adopted child with a near-perfect, genetically-related "fantasy" child. This enables them to blame ordinary problems which all parents face on their child's supposedly "defective" genes. Thus, while non-adoptive parents are focused on nurture, some adoptive parents are solely focused on nature (i.e. heredity) instead. This results in what could have been an easily resolved problem, going unresolved in families with adopted children, possibly accompanied by child abuse.
In an open adoption, as I define it, the adopters and the birthparents both know each other's full names, both first and last names. (It is not open if only one side has identifying information about the other.) They may agree to exchange photos and letters directly, without using the agency or attorney as a middleman. Sometimes a semi-open adoption later becomes an open adoption, if both parties decide that they want it that way.
Birth and adoptive families are counseled about the importance of honoring one’s word in open adoption agreements through American Adoptions. If, for some reason, contact is lost and one party is unable to reach the other, we’ll hold any correspondence intended for them for up to 18 years in case they notify us and request to receive that communication and want to get back in touch.
Although practices vary state by state, most adoptions start with the birth mother reviewing dozens of adoption profile books  or online profiles of prospective adoptive parents. Usually, these are adoptive families who have retained that agency or attorney to assist them in the adoption process. Most US states permit full openness not just regarding identities, but also personal information about each other. Just as the adoptive parents want to learn about the birth mother's life and health history, so does the birth mother want the same information about the people she is considering as the parents for her child.
Usually, semi-open refers to an adoption in which the adopters and birthparents meet once or twice and on a first-name-only basis. In addition, they may agree to exchange pictures and letters on an annual or fairly infrequent basis through the adoption arranger. (If your adoption arranger advocates a semi-open adoption, be sure to ask for an exact definition of her terms.)
Open adoption is a form of adoption in which the biological and adoptive families have access to varying degrees of each other's personal information and have an option of contact. While open adoption is a relatively new phenomenon in the west, it has been a traditional practice in many Asian societies, especially in South Asia, for many centuries. In Hindu society, for example, it is relatively common for a childless couple to adopt the second or later son of the husband's brother when the childless couple has limited hope of producing their own child.