However, sometimes, having a scan can cause unnecessary worry. It may show a very minor problem, or something that may get better on its own. onlinelibrary.[Accessed July 2017] Loughna P, Chitty L, Evans T et al. Fetal size and dating: charts recommended for clinical obstetric practice. Meet thousands of Mature Singles in Sca with Mingle2's free Mature personal ads and chat rooms.Our network of Mature men and women in Sca is the perfect place to make friends or find a Mature boyfriend or girlfriend in Sca.The dating scan isn't designed to look for more subtle abnormalities, though. That will happen at your next routine scan at about 20 weeks However, some major problems can be seen at your dating scan, such as issues with the umbilical cord or with your baby's skull or abdominal wall. The sonographer will put some gel on your tummy and move a small hand-held device (transducer) over your skin to get views of your baby. It won't hurt, although you may feel a little pressure on your tummy.
How big your baby will be depends on when you have the scan: After 13 weeks, your baby can curl up and stretch out, so measuring the length becomes less accurate.
If your womb (uterus) is very deep in your pelvis, or if you're overweight, you may be offered a vaginal scan, which can get a closer view of your baby.
It shouldn't be uncomfortable, and you don't need a full bladder Your sonographer will give you a report of the scan, which will tell you exactly how many weeks pregnant you are.
You may need a second scan to check the first scan's findings.
The dating scan will also show if you're expecting twins, triplets, or more.
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It may lead to you being given a high chance for Down's syndrome, when your baby is actually developing normally (false-positive result). Addition of non-invasive test to improve screening for pregnant women.