How old is to old for a man to get a woman pregnant?

mid to late fourties would be pushing it. if in fifties, that probably wouldn't be all that healthy for the mom or the baby. most women are in menopause by then anyway:)

It's possible.

This vary a lot from woman to woman. Some go early into the menopause, some at age 29 even. Others do not until well into their 50's.As a general rule we can say that when you start the menopause and...

old enough to have a period

Men can usually father children a bit beyond 70.