A1 a system of communication consisting of sounds, words, and grammar, or the system of communication used by people in a particular country or type of work: She does research into how children acquire language.
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.
Different details can be learned at different times during your pregnancy. 1  1st-trimester fetal ultrasound is done to: See how your pregnancy is going. 2  2nd-trimester fetal ultrasound is done to: Estimate the age of the fetus. 3  3rd-trimester fetal ultrasound is done to: Make sure that a fetus is alive and moving.