Babies Born our of Wedlock

My grandmother had her first 2 babies out of wedlock in Norway in 1909 and 1911, with 2 different men; and I learned that she didn't raise them and her family didn't raise them, or the fathers. The children were being take care of by an entirely different family. When she left Norway, she brought her first child with her, she came to America with the father of her first child as well. Does anyone know why she wouldn't have raised them, or the fathers or her family? and would leave one child behind? I mean did they take babies away from girls who weren't married? Could she not take the other child out of the country without the fathers consent? Any thoughts would be greatly appreciated. Thank you