The most desired age for adoptable children is under 2 years. These children are still technically defined as infants. Finding infants to adopt is possible in nearly all adoptive options. Infants are available overseas and domestically. They're adoptable from private agencies and independently. It's possible to have an open relationship or closed relationship with their birth families.
Beyond the customizable process that isn't necessarily available for older child adoptions, babies are preferred by firs-time parents because it gives them the full experience of raising a child from infancy. By adopting an infant, the adoptive parents feel they have more control over the child's environment and think this will affect any health or behavioral issues that may manifest in a child adopted at an older age.
Some adoptive parents are cautious about infant adoption from other countries because the foster or orphanage care may be poor, which can affect the child's health severely. Other adoptive parents are cautious because they do not want to risk the chance that the child will grow up to have health issues unforeseeable at such a young age. People will those fears expect their child to be near-perfect because they feel they wouldn't settle for any less. But, what they don't take into concern is that even biological children are full of medical surprises.
Unfortunately, adopting infants isn't an opportunity open to everyone. This is particularly true in domestic adoptions, where nontraditional adopters have a difficult time adopting healthy infants. Nontraditional adopters, such as single parents, will probably need to adopt internationally if they're looking for an infant.