Have you seen our images of fetal ultrasound at between eight weeks and 12 weeks?

An ultrasound scan involves transmitting high frequency sound waves through the uterus.

During the scan, the sonographer will put gel on your tummy and move the transducer over your skin.

how accurate are 12 week dating scans-11

If you are experiencing pain or bleeding for example. You may have your first scan if unsure of the date of LMP.10 to 14 weeks - It is recommended that all pregnant women have a dating scan in the first trimester at around 12 weeks of pregnancy to confirm their dates.

First trimester ultrasonic scans may show 'soft' markers for chromosomal abnormalities, such as the absence of fetal nasal bone, an increased fetal nuchal translucency (back of the neck) to enable detection of Down syndrome fetuses.

Sometimes your midwife may suggest a growth scan if the baby feels and measures smaller or larger than expected.

There is no hard and fast rule for the number of scans you should have during pregnancy.

About 18 - 20 weeks - Some women are offered a scan in the second trimester at around 18 to 20 weeks.

Known as the anomaly scan or Level II to check that your baby is developing normally.

If your pregnancy is going well, your first ultrasound scan will be your dating scan, between 10 weeks and 14 weeks of pregnancy.

Early scan An early scan is offered from six weeks, so before your dating scan.

It is not to provide the first photo for your baby album, or to find out your baby's sex.

It is to check that your baby is growing and developing normally.

Your midwife or GP will only recommend an early scan if there's a concern, for example, if you've had bleeding in this pregnancy.