Start 1st dating scan

1st dating scan

The EDD from the early dating scan is used - if the last menstrual period is not known or is unreliable, or the dating scan differs from the last menstrual period dating by more than 5 days.

I am sitting here grinning to myself as no one else in my office knows yet.

Ultrasounds performed after 22 weeks gestation cannot be used to estimate the due date of the baby because the size no longer reflects the age very well.

Even average babies can differ by up to 2 to 3 "weeks of growth";.

Aww sorry to hear that but we have fingers crossed for you and lots of positive thinking! It seems like this is 9 months of worrying for most people?