(Via Hot Air) Apparently there’s some suggestion that it’s relatively less likely to happen – at least, as compared to Valentine’s Day. The article speculates that it might be because of a cultural subconscious desire not to have a kid on a holiday associated with ghosts and witches and spirits and whatnot. I’m not sure why – the only thing that I remember about kids born on Halloween is that they’re supposed to have Second Sight, which would be kind of handy to have on general principles, and a marketable skill to boot. Mind you, I’m probably not the best person to assess that sort of thing, being a weird nerd and suchlike.
As to whether or not women can control their going into labor… I dunno, ask my wife. She scheduled the birth of my youngest around Thanksgiving dinner; at least, that’s what it felt like.