ULTRASOUND SCANS IN PREGNANCY
All pregnancy should have scans done at specific points. Scans done at these different points give information unique to that particular point in pregnancy.
The viability scan between 4-10 weeks confirms location, number of babies and viability. The type of twin pregnancy is determined at this pregnancy.
The First Trimester Scan, also called the genetic scan, performed from 11-14 weeks allows for accurate screening for genetic conditions most common in pregnancy. It also screens first time mothers for the dangerous pre-eclampsia (hypertension of pregnancy), risk of pregnancy loss and stillbirth can be checked.
The detailed scan performed at 18-22 weeks analyses the baby for structural problems. In general 80% of major anomalies are detected with this study. The preterm birth screening is also performed at the same sitting.
Fetal echo is the assessment of the fetal heart in detail. It is usually performed from 22-26 weeks, especially if the previous assessment during detailed scan is incomplete or if there are strong familial predisposing factors.
3d and 4d scans can be done at any point in pregnancy. For pictures of the face it is best done from 26 weeks.
All scans performed after the above is for growth and general health
of the baby.
Ultrasound scans are safe in pregnancy especially with modern equipment. There have been no reported harm to the baby with millions of scan done every year around the world.