Once the adoption has been approved, the agency transfers the infant from foster care (if used) to the adoptive parents. After the infant has spent a few weeks or months with the adoptive parents, a local judge formally and legally approves the adoption. The natural mother has until the final court hearing. The infant is then issued a second, amended certificate, sometimes stated to be a birth certificate, that states the adopting parents are the child's parents. This becomes the adopted person's permanent, legal "birth" certificate. 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). Originally, the sealed record laws were meant to keep information private from everyone except the 'parties to the action' (adoptee, adoptive parent, birthparent and agency). Over time, the laws were reinterpreted or rewritten to seal the information even from the involved parties.
Like any relationship, open adoption relationships evolve over time. Post-adoption contact may increase or decrease, or the nature of the contact may change along with people’s changing lives. However, even in the most open adoption relationship, the birth parent is not a co-parent but rather another very important person in the child’s life. The child’s adoptive parent(s) are his or her legal parent(s) and they have all rights and responsibility for the child. Most importantly, when birth parents and adoptive parents set out to forge their relationship, the child’s needs must always be paramount.
At present, most adoption agencies let the birth mother decide on most of the terms of the adoption, including how much interaction she wants to maintain with the child and adoptive parents. The agency then looks for the suitable adoptive family that will adhere to the birth mother’s wishes. Even so, there are still some birth parents who prefer closed adoptions and deny contact or exchange of identifying information.
Females have statistically been somewhat more likely than males to search for their birth parents, and are far more likely to search for their adopted children. Very often, the reason the infant was put up for adoption in the first place was the birth father's unwillingness to marry or otherwise care for the child. Nevertheless, many birth fathers in this situation have agreed to meet with their grown children decades later.
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.