Great article! Wish I'd seen that to forward to my mum when she was hassling me to give her a DATE - I kept saying that it was soon (this was 4 days before he decided to come lol) and when the baby was ready, but she wanted a DATE because the doctor of someone else she knew gave her a date...ummm ok BUT it's only an ESTIMATE!!! So I went FINE it's 18th... lucky for me he decided to come a few days early to save his mummy from being annoyed to death! I've actually always said that pregnancies are in fact an average of 42 weeks long not 40.