Have you had to be put on antidepressants after giving birth?

Yes that can happen: It is called post partum depression which is not uncommon so if u need them it is important that you get on something and are followed closely either by your obgyn or psychiatrist.

Not personally: Many women develop the Blues after delivery. But some women have more serious depressive symptoms which are is diagnosed as postpartum depression. This usually responds to antidepressants.