On June 1, 2009, Ontario, Canada, opened its sealed records to adoptees and their birth parents, with a minimum age of 18 for the adoptee, or one additional year if the birth parents initiate the request. Both parties can protect their privacy by giving notice of how to be either contacted or not, and if the latter, with identifying information being released or not. All adoptions subsequent to September 1, 2008, will be "open adoptions"
Some (not many) agencies encourage a complete disclosure of identities between birthparents and adopting parents, as well as an ongoing close relationship. Agencies that support fully open disclosures believe that an open adoption is a better way for both adoptive parents and birthparents—as well as the children. Agencies that don't support open adoption feel just as strongly that continued contact is not a good idea for any of the parties.
Grotevant, however, sounded a note of caution to those who portray it as a panacea. The children of open adoption do not have higher self-esteem than those in closed adoptions, he observed. For children in each group, self-esteem is about the same, his research found. He stressed that more research is needed to assess the impact of open adoption on adolescents. (The research he did with McRoy studies children up to age 12.)
Before the 1980s, most adoptions were kept closed. This is because women who go through unexpected pregnancy simply relocate while pregnant, give birth and then return to their homes. The doctor or an agency then looks for an adoptive family for the child without the mother knowing. This kind of setup can bring about a lot of complications and confusion within the adoptive family, particularly on the adopted child.
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.
Closed adoption, not to be confused with sealed records, is an adoption in which the adoptive family and the birthmother never meet and know nothing or very little about one another. With the advent of open adoption, closed adoptions have become the exception in domestic adoption rather than the rule. The term closed adoption is most often used in relation to post-adoption contact, whereas the term sealed records is related to the access of legal documentation surrounding the birth and placement of the adopted child once the adoption is final. It is entirely possible to have a closed adoption and unsealed records or an open adoption with sealed records. The two practices are not mutually exclusive.