As soon as possible. We recommend you book-in to see Guy when you are between 8 to 10 weeks pregnant. Or 4 weeks after your last, missed period. This allows us to do an accurate dating scan. A dating scan helps us establish the exact age of your baby, and will give you your most likely due date.
Unless you have been told by Guy, you will not need a scan before this time as, if the scan is done too early, Guy will not be able to see the baby properly.