It is this probe which sends out ultrasound waves and picks up the echo when they bounce back. Scanning requires a lot of concentration, especially if your baby is active.Having the scan does not hurt, but the sonographer may need to apply slight pressure to get the best views of the baby.Tissue paper will be tucked around your clothing to protect it from the ultrasound gel.
They will check that you and your baby are well, give you useful information to help you have a healthy pregnancy (including healthy eating and exercise advice) and answer any questions you may have.You will also be offered antenatal classes, including breastfeeding workshops.The scan image will be best viewed in a room that is dimly lit.You will first be asked to lie on a couch and raise your top to your chest and lower your skirt or trousers to your hips.Studies have shown that three in four foetuses with Down's syndrome do not have a visible nasal bone at this stage of development.
The foetus will be measured and the precise gestational age calculated.
A measurement of 3mm and above indicates a higher risk of Down's syndrome.
At the same time, the sonographer will check to see whether a nasal bone is visible on the scan.
There is a large dedicated team to providing one to one individual care with the patient during their scan.
You may be seen by a sonographer or radiologist depending on the type of scan requested by your referrer.
You need to book antenatal classes in advance, so ask your midwife about when you should book classes in your area.