I recently came to know of a new phenomenon in North India
In big families, where, lets say, in a hypothetical situation, one brother has several children, and the other has none. In this scenario, they actually GIVE a child to the childless couple to keep as their OWN.
Though it is extremely large hearted & strong to do so to help, how difficult & testing it must be to give away the fruit of your love & labor to someone else? Surprisingly, disputes regarding property etc are extremely rare later on. A surprising and innovative new finding