Yesterday, back safe and somewhat sound, my husband out of NO WHERE says, "Let's have a baby."

Is this a response to trauma? I am at a loss. I've kind of considered a baby lately, but I think it just might be biological pining (though I have made some noises about it)... and he's been happily child-free for years. But I don't know. I feel really unsure.

For those who decided to have a baby, how did you decide?