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    13 week ultrasound (starting sept 1st)
    12+3 - 14+3 weeks
    The 13 week ultrasound is an extensive medical ultrasound between 12+3 and 14+3 weeks where possible congenital abnormalities are examined.
    30 min
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    What is a 13 week ultrasound

    The 13 week ultrasound is an extensive medical ultrasound between 12+3 and 14+3 weeks where possible congenital abnormalities are examined. Fortunately these are uncommon and most babies are born healthy. 

    The 13 week ultrasound is also known as the anomaly ultrasound. The purpose of this ultrasound is to examine if the baby may have an open back and/or skull or any abnormalities of other organs, such as the brain, face, heart, stomach, bowels, kidneys, bladder or limbs. In addition checks are performed on the baby’s growth, the amount of amniotic fluid and the position of the placenta. The 13 week ultrasound cannot identify all abnormalities. Which means the 13 week ultrasound does not guarantee a healthy baby.

    Who is the ultrasound for

    The 13 week ultrasound is especially for pregnant women who do not show an increased risk of their baby developing congenital abnormalities. If family history shows a genetic abnormality, it may be the case that the 13 week ultrasound will be performed at the hospital under the care of a gynaecologist. This is called Advanced Ultrasound Examination (GUO). Your midwife will discuss with you beforehand if you should make an appointment for either a 13 week ultrasound or a GUO. The option to undergo either the 13 week ultrasound or the GUO is always a choice to be made by the expectant parents.


    The 13 week ultrasound results will be discussed with you immediately. Should the sonographer detect an abnormality or have reason for concern, they will pass this information on to your midwife. Your midwife (if you wish) can then arrange a consultation with a gynaecologist.  The follow up examination consists of an extensive ultrasound at a specialist hospital where your baby will be screened further. In some cases the examination will show that there are no reasons for concern after all. Occasionally you will be given the option of having an amniotic fluid test (also called Amniocentesis) in order to exclude genetic defects. During each follow up examination it is your own decision to have this test and what to do with the results.

    Your baby’s sex

    At the 13 week ultrasound you will not be told whether your child is a boy or a girl. Even if it is already visible, it has been agreed nationally that the sonographer is not yet allowed to make any statements about this. You can, however, have an ultrasound at Focus Verloskundig Centrum from 15 weeks at your own request to find out the gender, a gender determination ultrasound.

    Extra information

    Before the 13-week ultrasound, you will first have an extensive conversation with your obstetric care provider. More information about the 13-week ultrasound can be found at and in the folder. This brochure is provided by the midwife or can be downloaded The 13-week scan and the 20-week scan (English)

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