Dating scans in pregnancy
Before the scan you will be asked to drink a lot of water and have a full bladder, as this puts the uterus in a better position to be scanned.
This can be something of an uncomfortable challenge if your sonographer has particularly long waiting times.
Traditionally the last menstrual period has been used to date a pregnancy, but this may be highly inaccurate.
A simple formula is to take the first day of the menstrual period, subtract three months and add one week.
Dating a pregnancy accurately at the earliest possible time is important.
In a normal pregnancy it does not matter what the dates are, but if anything should go wrong it becomes very important as to what treatments may be prescribed.
Ultrasound scanning in early pregnancy can provide that confirmation and peace of mind that you need.
Most women in early pregnancy experience no problems, but not all.
You will have had earlier appointments and may have had an early scan if you've had any concerns such as bleeding, but otherwise this is the first time you'll get to see your baby, so it's a real milestone in your pregnancy.We ask that you to fill your bladder by drinking a pint of water before the scan.This makes it easier to see the uterus and ovaries as the full bladder pushes away the overlying bowel area.This scan can be carried out from 6 weeks to 18 weeks.
The most accurate time to date you pregnancy is after 8 weeks through to 13 weeks.
Whatever the reason, an early dating scan can give you peace of mind that all is well with your pregnancy and also ensure that you don’t miss out on the early first trimester screening tests that are available.