How accurate are dating scans at 13 weeks

07-Dec-2017 11:25

A very full bladder is not usually necessary for this scan but try not to come with an empty bladder.

He or she may need to prod your belly a bit to “encourage” the baby into a suitable position.A low-lying placenta usually moves up later in the pregnancy but if it doesn't, it can cause problems in labour so they will want to check its movements throughout your pregnancy.It's not completely foolproof – but the dating scan is a much more accurate way to work out how far you are into pregnancy than calculating it by the date of your last period, which is the only method the midwives will have used so far to work out your due date.Here are the main checks they'll be making: Your baby will be measured and the exact stage of pregnancy will be calculated from the measurement made from crown to rump.