Being a single mother was obviously a big economic disadvantage. And in the times when the Christian church morality dominated every day life, being a single mother was obviously a proof of a sin. But from practical point of view, a being a single mother wasn't very different from being a widow with a child, and that wasn't uncommon, considering high mortality rates in those times.
Since when did it become a cultural stigma, or more precisely, what was the severity of such a state in which periods?
(I'm focusing primarily on European history, but I'd be interested to know in other cultures/eras as well.)