Decades ago, virtually all adoptions were closed. A closed adoption means that there is no contact whatsoever between the birthparents and the adoptive parents and child after the adoption takes place. In fact, there may also be no contact before the adoption. Nowadays, however, the trend in the United States is toward open adoptions, in which all the parties to an adoption meet and often remain in each other's lives.
Open adoption has slowly become more common since research in the 1970s suggested that open adoption was better for children. In 1975 the tide began to change, and by the early 1990s open adoptions were offered by a majority of American adoption agencies. Especially rapid progress was seen in the late 1980s and early 1990s - between 1987 and 1989 a study found only a third of agencies offered fully open adoption as an option; by 1993 76 percent of the surveyed agencies offered fully open adoptions. As of 2013, roughly half of US states consider them legally binding, however contact in open adoption is not always maintained.
It’s important to keep in mind that, while adoption relationships can change, it is more complicated to increase contact than to decrease it. If a birth mother starts with an open relationship and then decides later that she needs distance, she can do this at any time. However, if an adoption is closed and a birth mother wants more contact, then she has to come to an agreement with the adoptive family. Therefore, it is especially important that a birth mother choosing closed adoption is sure that it is what she wants.
Although pre-birth openness is becoming routine in newborn adoptions there are more variations in the years following the birth, after the adoption has been completed. Some birth mothers want to get to know the adoptive parents before the birth, but then wish to go "their own way" in life thereafter. Getting to know the adoptive family gives her confidence in the placement and the knowledge she can feel secure in the child's future with the parents (or single parent) she selected. The birth mother may feel that future contact with the adoptive parents, or the child, would be emotionally difficult for her.
A closed adoption is the type where there is totally no contact between the birth parents and the adoptive parents as well as the child. There is also no classifying information shared between families about each other, thereby effectively cutting possible contact between the two. Before the child joins the family, the adoptive parents are provided with non-identifying data about the child and his or her birth family. Once the adoption is concluded, all records are sealed. These sealed records may or may not become accessible to the adopted child once he or she turns 18, but this is dependent on the signed paperwork and local law.
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Some states have confidential intermediary systems. This often requires a person to petition the court to view the sealed adoption records, then the intermediary conducts a search similar to that of a private investigator. This can be either a search for the birth mother at the request of the adoptee, or vice versa. Quite often, in the many years which have passed since the adoptee was born, a birth mother or female adoptee has both moved to another address, and married or remarried resulting in a change of her surname. While this can make the search difficult and time consuming, a marriage certificate may provide the needed clue as to the person's whereabouts. If and when the intermediary is able to contact the birth mother (or adoptee), she is informed that her adopted child (or birth mother) is inquiring about her. In the few states that have open adoption records, should this party indicate that he or she does not want to be contacted, by law, the information would not be given out. Upon completion of the search in which the birth mother agrees to be contacted, the intermediary usually sends the adoptee the official unamended birth certificate obtained from the court. The adoptive parents' application to an adoption agency remains confidential, however.
Keep in mind that adoption relationships are ever evolving. One adoption may be fully open and then the birth mother decides to limit contact, while another adoption may be semi-open and then both the birth parents and adoptive family decide to engage in a more open adoption. While American Adoptions does require adoptive parents to be open to a certain standard of communication, what your adoption communication will look like will ultimately depend on the preferences of the pregnant woman who chooses you.
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.
There are also private search companies and investigators who charge fees to do a search for or assist adoptees and birth mothers and fathers locate each other, as well as to help other types of people searching. These services typically cost much more, but like search organizations and search angels, have far greater flexibility in regards to releasing information, and typically provide their own intermediary services. However, they may not circumvent the law regarding the confidentiality process.