Ultrasound dating scan
This is a detailed ultrasound scan, usually carried out when you are between 19 and 20 weeks pregnant.
If necessary your midwife will arrange appointments for you to see a specialist to discuss the long term implications for the health of your baby.
So whilst a normal 20 week scan is very reassuring it cannot guarantee a healthy baby.
This scan usually takes around 40 minutes although it can take longer if the baby is in a difficult position or if a problem is detected.
The quality of the pictures we get depend on a number of factors including the position of the baby, the position, shape and structure of your womb, maternal BMI and the gestation of the pregnancy.
If for any of the reasons listed above we are unable to complete our checks on your baby we will arrange a follow up scan for you.