The Ultrasound test

Dating ultrasound  

The dating ultrasound is performed to find out when the baby is due and what the pregnancy period will be. In most cases this test is conducted through the abdominal wall. The quality of this ultrasound, however, may be insufficient because of poor visual quality or any other factors that may present themselves. In this case the test will be performed vaginally (through the vagina). We recommend having a dating ultrasound between 10 and 12 weeks of pregnancy.

Ultrasound after loosing blood  

This test is about finding out whether the pregnancy is intact and vital, or whether the pregnant woman might be having a miscarriage. Other factors too can be causing loss of blood. This test will be performed either through the abdominal wall or vaginally (through the vagina). It depends on the gestational age (pregnancy duration).

Localising the placenta  

This ultrasound is meant to localise the placenta with respect to the cervix. The test will only be performed if we are not certain whether the placenta is near the cervix (‘low’). In principle, this test will always be performed vaginally (through the vagina). The best period to have this ultrasound is between 30 and 32 weeks of pregnancy. 

Growth ultrasound  

The growth ultrasound is about verifying the growth of the baby in a certain period of pregnancy. This helps us estimate whether the baby shows average, (very) small or (very) large growth.
In principle, this test will always be performed through the abdominal wall.

Combined test
 

The combined test is performed to measure the thickness of the skin fold behind the nape of the neck and test for two hormones that might exist in the mother’s blood.
This test helps us estimate the chance of having a child with trisomy (Down, Edwards or Patau syndrome). This test is part of the prenatal screening test. It is performed between 9- 13 + 5 weeks of pregnancy (see prenatal screening for more information on the combined test and different types of trisomy).
 

Folder informatie over de screening op down edwards en patausyndroom Engels    Download here the RIVM leaflet on screening for Down syndrome.



 

Structural echoscopic examination (SEO)

The structural echoscopic examination is an ultrasound performed to detect a spina bifida (split spine) in the first place. Today other congenital defects can be tracked as well. The structural echoscopic examination is part of the prenatal screening test. It takes place between 18 and 22 weeks of pregnancy (see prenatal screening).

Informatie over de 20 weken echo engels    Download here the RIVM leaflet on the structural echoscopic examination.