Dating pregnancy ultrasound vs lmp
Unfortunately, miscarriages are quite common in the first trimester.
If this happens to you, it can be devastating, but rest assured that it doesn't mean that you'll miscarry again the next time you get pregnant.
This is completely normal as each baby has different proportions and grows slightly differently.
If all babies grew exactly the same way, all babies around the world would be the same height and weight when they were born!
If your scan reveals more than two weeks' difference between your gestational age and the scan age, your doctor will probably ask you to have another scan.
The difference could mean different things depending on what stage of your pregnancy you are in: First trimester A difference in age in your first trimester could indicate two things: In the case of a missed miscarriage or blighted ovum, there will also be no heartbeat.
If the Doppler scan finds that the umbilical arteries are normal, it might just mean that you have a small baby.In the second and third trimester, a difference in age of up to two weeks is considered normal between your gestational age and the ultrasound scan age.After all, your gestational age doesn't start from the actual day of conception but from your last menstrual cycle.Your doctor calculates your stage of pregnancy or your gestational age using your last menstrual period.
She will ask you when the first day of your last period was and from there, count how many weeks pregnant you are.This is also how your doctor will estimate your due date by counting 40 weeks from the first day of your last period.