Obstetric ultrasound is an essential diagnostic tool in pregnancy. The antenatal detection of medical problems in pregnancy and with the baby is very important. Early detection enables identified problems to be managed and, in some cases, antenatal treatment can be instituted. Common concerns that can be detected or predicted include chromosomal abnormalities, a small baby, pre-eclampsia and structural problems with the baby. It is reassuring for parents when a scan shows that their baby that is developing normally. Scanning helps with pregnancy bonding, and this cannot be emphasised enough.

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