Plenty of illegitimate children back then. Somehow it did not kill them.
Which abortion does.
Probably so, but given the contracts the Actors had with so called “Morality Clauses”, the studios had big investments in them and they in turn had a public image to uphold, so none of these women could have out of wedlock children if they wanted to continue working. Different rules then.
The studios back then covered up all sorts of things their actors did some of them criminal. Read up on Eddie Mannix the ultimate Fixer for MGM. If he had left a book it would have blown the doors of Hollywood on the things he did for the studio.