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Read more US uses measurements of the gestational sac and then the growing fetus to date a pregnancy. Usually measurements are compared to standards for various parts of the pregnancy and a date assigned. Read more A pregnancy dating ultrasound done at 8 to 11 weeks of pregnancy is pretty accurate when done by an experienced technician.
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She will be able to identify where the sac has implanted in your uterus to rule out an ectopic pregnancy.However, if the doctor needs to check your cervix (mouth of uterus and birth canal), a transvaginal scan may be done as it is more accurate.During an abdominal scan, the doctor will put some (usually very cold) gel on your tummy.In these early weeks of pregnancy, your baby is too small and low in your abdomen to be picked up by an abdominal ultrasound scan.A vaginal scan is done by introducing a probe into your vagina. Abdominal scan After 10 weeks and for the rest of your pregnancy, you will have an abdominal scan.