Who doesn't love a new baby in the office!?
I love it, personally. I will *never* give up an opportunity to coo at, make faces at, and/or cuddle a baby.
But quite a lot of childless people find it really upsetting. And you probably wouldn't know if one of your colleagues was having a miscarriage right now, or struggling with fertility etc.They don't hate babies. They don't hate joy. They don't want to cry at work or have to explain to all their colleagues about child death, or their feelings of failure, or their heartbreak.
If you manage people without children, and you know you're having a staff member bring their new baby in, it would be good to give people a heads up, so they can opt out, or better yet, ask the parent bringing the baby in to stay in an area and let people come to them, instead of going desk to desk.