How likely is it that I will deliver on my due date?

We all know the answer is ‘not very’ – but interestingly 37 weeks is more likely than 42…

Distribution of babies born by week:

37 weeks – 5.69%
38 weeks – 14.36%
39 weeks – 21.56%
40 weeks – 32.44%
41 weeks – 14.65%
42 weeks – 3.40%
43+ weeks – 0.13%

Also:

Babies born *on* the due date = 4 to 5%