The sonographer will put some gel on your tummy and move a probe over the skin.
The image will come up on a big screen television so that you can see all the structures that are being examined. The heart rate is worked out to determine viability. This includes measurements of the head, abdomen and femur bone in the leg. The amniotic fluid volume, placenta location and umbilical cord vessels are also assessed.
To be pregnant and give birth to a child is usually a life-changing event.
Many couples wish to confirm the pregnancy by having a scan and getting the necessary pregnancy tests done by a doctor or midwife.
Early obstetric scans may be performed between 6 and 11 weeks of pregnancy.
Keep in mind that this is 6 to 11 weeks from the first day of the last menstrual period.
You can have your first pregnancy scan, called the viability or dating scan, done privately when you are 6 to 11 weeks pregnant.
If you have been breast feeding or have recently stopped the oral contraceptive pill you may have had an unusual cycle so you may not be sure of your LMP.
Often information on the structure of the baby is limited at this early stage.
This scan is performed in early pregnancy to determine the age of the pregnancy (also known as the gestational age) using measurements.
The fetal heartbeat is normally visible from 6 weeks onwards.
It is usually done vaginally to allow a clearer picture of the baby.