Thanks to modern medicine there are a range of ways for a human to come into the world, from a tight squeeze to a trip out the sunroof via caesarean. Parents' experiences can range from seamless to fraught, and those who have been through a traumatic birth may struggle to come to terms with it long after it’s over. Given that it can have fatal consequences for both the parent and the baby, you might think we as a species could've evolved in favor of a safer and easier way of giving birth. Unfortunately, according to a recent study published in the journal Proceedings of the National Academy of Sciences, this is probably as good as it gets.