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Known as the anomaly scan or Level II to check that your baby is developing normally.
A scan performed at 18 to 20 weeks the fetus is large enough for an accurate survey of the fetal anatomy.
Ultrasound has been used in pregnancy for about 30 years, it has progressively become an indispensible obstetric tool and plays an important role in the care of every pregnant woman.
Otherwise a scan is generally booked in the first trimester to confirm pregnancy, exclude ectopic or molar pregnancies, confirm cardiac pulsation and measure the crown to rump length for dating.
Ultrasound examinations are performed on your lower abdomen.
It is not necessary to go in very deeply, and it will not harm you or your baby in any way.
You would usually be asked to empty your bladder before vaginal scanning.
Congenital malformations, multiple pregnancies can be firmly diagnosed and dates and growth can also be assessed. Further scans may be necessary if abnormalities are suspected.28 to 40 weeks - Growth scans in the third trimester may be recommended if a previous baby was small, if you are having twins or when there are other complications of pregnancy, for instance if you are diabetic.