The wide range of values reflects the paucity of information on the subject and demographic factors such as age; it is known that teenagers are more prone to having their adoptions disrupted than young children. Adoption by same-sex couples
Joint adoption by same-sex couples is legal in 34 countries as of March 2022, and additionally in various sub-national territories. Adoption may also be in the form of step-child adoption (6 additional countries), wherein one partner in a same-sex couple adopts the child of the other. Most countries that have same-sex marriage allow joint adoption by those couples, the exceptions being Ecuador (no adoption by same-sex couples), Taiwan (step-child adoption only) and Mexico (in one third of states with same-sex marriage). A few countries with civil unions or lesser marriage rights nonetheless allow step- or joint adoption. Parenting of adoptees
Parenting
The biological relationship between a parent and child is important, and the separation of the two has led to concerns about adoption. The traditional view of adoptive parenting received empirical support from a Princeton University study of 6,000 adoptive, step, and foster families in the United States and South Africa from 1968 to 1985; the study indicated that food expenditures in households with mothers of non-biological children (when controlled for income, household size, hours worked, age, etc.) were significantly less for adoptees, step-children, and foster children, causing the researchers to speculate that people are less interested in sustaining the genetic lines of others.
As a result, many of Europes abandoned and orphaned children became alumni of the Church, which in turn took the role of adopter. Oblation marks the beginning of a shift toward institutionalization, eventually bringing about the establishment of the foundling hospital and orphanage.As the idea of institutional care gained acceptance, formal rules appeared about how to place children into families: boys could become apprenticed to an artisan and girls might be married off under the institutions authority. Institutions informally adopted out children as well, a mechanism treated as a way to obtain cheap labor, demonstrated by the fact that when the adopted died their bodies were returned by the family to the institution for burial.This system of apprenticeship and informal adoption extended into the 19th century, today seen as a transitional phase for adoption history. Under the direction of social welfare activists, orphan asylums began to promote adoptions based on sentiment rather than work; children were placed out under agreements to provide care for them as family members instead of under contracts for apprenticeship. The growth of this model is believed to have contributed to the enactment of the first modern adoption law in 1851 by the Commonwealth of Massachusetts, unique in that it codified the ideal of the "best interests of the child". Despite its intent, though, in practice, the system operated much the same as earlier incarnations. The experience of the Boston Female Asylum (BFA) is a good example, which had up to 30% of its charges adopted out by 1888.