Obstetric dating ultrasound
You can ask your midwife or doctor before the scan if this is the case. Find out more about what happens during a pregnancy ultrasound scan.The screening test for Down's syndrome used at this stage of pregnancy is called the "combined test".You may find one of our health articles more useful.Obstetric ultrasound was first introduced in the late 1950s.The ultrasound department provides pregnancy and gynaecology ultrasound.
If you have agreed to have screening for Down's syndrome, the dating scan and the screening will usually happen at the same time.Additional information on fetal well-being is assessed by measuring the depth of the biggest liquor pool.Women with a normal uterine artery Doppler do not require serial measurement of fetal size and serial assessment of well-being with umbilical artery Doppler unless they develop specific pregnancy complications - for example, antepartum haemorrhage or hypertension.Your midwife or doctor will book you a dating scan appointment.It will usually take place at your local hospital ultrasound department.
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