How old is too old to have children?

[Jaelle]

I have a friend who is in her late 40's who focused on her career and never had children. She has just married for the first time and she and her husband have decided to try to start a family. She's aware that it may be a difficult journey but they want to try. She's not worried that they may be too old. She's fit and healthy and believes age doesn't matter.

We see older men become fathers all the time. Many celebs have had children late in life. And they don't see a problem.

How old do you think is too old to have a baby?