Prologues - good, bad or just plain lazy??

I've been playing with my story that did well in the Emmy, Mummy Makes Three. It has a prologue and I've been debating cutting it. I've read that prologues are lazy writing and they generally don't help the story.

In this case we have a lovers reunited story. The prologue is the dramatic birth of their child nine years before the story starts. All the crits I've had, only one person has disliked the prologue. Most feel immediate empathy with the mother giving birth.

What do you think?

Prologues - are they a waste? Is it a sign of laziness? Is it just the worst kind of info dump?

Am I just asking this question to avoid editing?