Dating scan accuracy

Transvaginal scans may be used early in pregnancy to diagnose potential ectopic or molar pregnancies.There is not a recommended number of ultrasounds that should be performed during routine prenatal care.

Standard Ultrasound – Traditional ultrasound exam which uses a transducer over the abdomen to generate 2-D images of the developing fetus.Ultrasounds are usually combined with other tests, such as triple tests, amniocentesis, or chorionic villus sampling, to validate a diagnosis.An ultrasound exam may be performed throughout pregnancy for the following medically-necessary reasons: First Trimester: The ultrasound is a noninvasive procedure which, when used properly, has not demonstrated fetal harm.3-D Ultrasound – Uses specially designed probes and software to generate 3-D images of the developing fetus.4-D or Dynamic 3-D Ultrasound – Uses specially designed scanners to look at the face and movements of the baby prior to delivery.

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