In some situations, such as when the scan is completed before 10 weeks of gestation or you are overweight, you may also need a vaginal scan. Increased NT and normal karyotype". Check with your ultrasound clinic for any preparation you need to do prior to the scan. To assess the risks of Down's syndrome and other chromosomal abnormalities. Information on pregnancy ultrasound scans including when they are taken, what it can be used for, dating scans, anomaly scans, plus links to trusted resources. All pregnant women in England are offered an ultrasound scan at around 8 to 14 weeks of pregnancy. What will I learn from a dating scan?
In such cases it would be advisable to monitor the pregnancy more closely.
The translucent area measured the nuchal translucency is only useful to measure between 11 and 14 weeks of gestation, when the fetal lymphatic system is developing and the peripheral resistance of the placenta is high. If you have had bleeding during your pregnancy or you have had previous miscarriagesyour doctor or midwife may recommend an early dating scan from 6 to 10 weeks gestation. An interventional study". Information on pregnancy ultrasound scans including when they are taken, what it can be used for, dating scans, anomaly scans, plus links to trusted resources. Ultrasound in pregnancy. Nuchal translucency scan.