when do you do your first ultrasound during pregnancy
2. Dating Scan. When is it carried out: When there are no problems, you will have to undergo two ultrasounds during your pregnancy. A dating scan will be the first scan that you undergo. The scan is booked atbetween 10 weeks and 13 weeks plus six days of pregnancy. What happens in the process: During this scan, the sonographer will apply gel on your tummy and move a hand-held device over your skin. The device is called a transducer.