Unfortunately this is the time of day you're most likely to give birth

Giving birth is exciting, but since your unborn baby can't tell time yet, there's a pretty good chance that they'll make their first appearance at a pretty inconvenient time. Now, we're not talking inconvenient like in the movies where a woman's water breaks during an important dinner or just before the big Spice Girls concert (Spice World, anyone?). We're talking like waking-up-in-the-middle-of-the-night inconvenience here.

According to a study from City, University of London, most spontaneous births occurred on weeknights between midnight and 6 a.m., with a peak at 4 a.m.

According to their data—which includes records of more than five million births over a 10-year period—this category makes up about half of all births. So unless you're getting induced or have already planned a C-section, chances are high that you'll be up and at it during the wee hours of the morning (not that you were getting much sleep at this point anyways—it's probably a good idea to get used to this).

Considering this news, you may also want to prep your partner for a rude awakening. Let them know that you'll likely have to shake them out of that groggy middle-of-the-night haze (they should get used to this too—face it, it's your new normal). Luckily, the shot of adrenaline that comes from hearing the words "I think the baby's coming" will get them going.

Hopefully you've already packed a hospital bag that's ready at a moments notice because once your baby decides they're ready, who knows how long you have until they pop out. If anything, at least you don't have to worry about getting stuck in traffic on your way to the hospital.

Read more: 8 signs of labour to watch out for Giving birth: The four stages of labour