USG Scan - Anomaly Scan (Twins) 4D Test

The Ultrasound anomaly scan is done in the second trimester of pregnancy. This scan show how your baby is growing and check the fetal movements, makes sure your baby's internal organs are developing well, detects certain birth defects in your baby, estimates the amount of amniotic fluid, checks the umbilical cord and position of the placenta, checks for markers of chromosomal abnormalities, checks your cervix and measure the birth canal. The anomaly scan is done between 18 and 20 weeks normally but can be done one or two weeks later in case of twins.

Anomaly scans are normally performed through the tummy that is trans-abdominally as your baby is big enough in second trimester. You will need to expose your tummy. So you are advised to wear loose or two-piece clothing such as pants and a top or skirt and top. This will allow the ultrasound doctor to access your tummy easily. You may be more comfortable too as you will not have to bother about removing your clothing. Apart from this no specific preparation is required. Although sometimes you may be asked to fill your bladder as this may allow identification of certain landmarks.

This anomaly test will help in identifying the number of babies you are carrying. Understand the shape and structure of baby's head. It is possible to detect severe brain problems at this stage, but fortunately these are very rare. Check for a cleft lip if any Check baby's spine, both along its length and in cross-section. Check baby’s heart stomach and kidneys. It helps in understanding how baby is growing The doctor can also the doctor will check: the placenta the umbilical cord the amniotic fluid

Lie down and Expose your abdomen by lifting the top a bit. The ultrasound doctor applies usually very cold gel to your tummy. The probe or transducer is moved over tummy to obtain images of your baby. As sound waves from the transducer bounce off your baby's features or organs, images are formed on a computer screen. The doctor tries to get many different views of your baby from different angles from head to toe, to get as much information as possible. Once doctor gets a clear picture of your baby's organs or body parts, measurements will be taken.