Direct sex chat sites - What happens at a dating scan

Looking for abnormalities isn't the purpose of this scan, though.

That's the job of your next routine scan at about 20 weeks, when more detail can be seen as your baby grows bigger.

Having a scan in the first few months of pregnancy can be a thrilling experience.

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You probably know when your LMP was, but not when you actually conceived.

If you do know the conception date, this is counted as day 14, and not day one.

Not all units offer an early scan if all is going well in this pregnancy, though.

Ask your GP if you want the reassurance of an early scan. The scan's main purpose is to work out accurately how many weeks pregnant you are and estimate your due date.

If your uterus (womb) is very deep in your pelvis, or if you're overweight, you may be offered a vaginal scan, which can get nearer to your baby.

It shouldn't be uncomfortable, and you don't need a full bladder.If you are having a screening test for Down syndrome, you'll be offered a dating scan first.The test needs an accurate due date to be reliable, as hormones in your blood vary according to your stage of pregnancy.If you have an irregular cycle, or if you've recently been taking the contraceptive pill, working out the date from your LMP isn't a very accurate method. The scan can check that your baby has a heartbeat and is developing normally.Your baby's head, limbs, hands and feet, and some organs can be seen.Without an accurate due date, a blood test at what you thought was 13 weeks wouldn't be helpful if you were 16 weeks pregnant when the blood was taken. National Down's Syndrome Screening Programme for England.

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