From the day our GP confirms we are pregnant, we are given a 'due date'. At first this date, the expected date to give birth, is an EDD (estimated due date). However, this date is often confirmed or adjusted at the 'dating scan' when measurements of the fetus noted via an ultrasound scan, can set a due date based on a more clear idea of how far the baby is down the line of physical development. For everything you need to know about how the due date is worked out, when it might be adjusted and so on, check out What's in a Due Date?.
Why does the due date matter?
A due date is useful to mums-to-be, giving them an idea of what to expect during the various different stages of pregnancy and helping them prepare for the arrival. Even more importantly, the due date helps medical professionals tailor and time your pre-natal care. Not only will the date be used to time tests and scans, but the size of your baby for its dates can have an impact on the prenatal care you receive. For example, a baby that is big for dates can be a warning sign for a maternal health problem such as gestational diabetes, while a baby that is small for dates may indicate an intrauterine growth restriction.
Of course, being small or big for dates does not mean that there is necessarily a problem, perfectly healthy pregnancies can see bigger and smaller babies, but it will be something that health professionals check out to be sure that there's nothing wrong.
When the due date approaches
The due date is particularly important when it comes to birth. Your baby is deemed to be ready for birth at 37 weeks and if you go into labour before this point then your baby is said to be premature and will need extra medical care and attention both during and after labour. Your due date will also have an impact on how birth is handled if you go significantly over your due date, as women who are more than two weeks overdue may be advised to have the birth induced to speed the process up.
You can also check out What happens if I go over my due date?.
