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Visualize the longitudinal plane of the uterus (sagital section) and evaluate its' size.

It can be measured from the cervix to the fundus, AP diameter, and width.

This includes, but is not limited to, power settings, basic orientation, and proper cleaning of ultrasound probes between uses.

First trimester scanning is useful to identify abnormalities in the early development of a pregnancy, including miscarriage and ectopic pregnancy, and provides the most accurate dating of a pregnancy.

If you experience any complications between your scheduled visits, call your doctor immediately.

Ultrasound is an essential tool for evaluating your baby during pregnancy.

You may also be offered an early scan if you've had a previous miscarriage.

Not all units offer an early scan if all is going well in this pregnancy, though.

Whether or not you receive an ultrasound during your first trimester of pregnancy depends on a number of factors, including your risk for complications.The role of the early anatomic survey, when free DNA screening for chromosomal anomalies is being utilized, remains to be determined.Any health-care provider performing diagnostic ultrasound must understand the physics of diagnostic ultrasound and have thorough, supervised training.The benefits of routine transvaginal ultrasound at 6–7 weeks from the LMP include: The standard of care for performing routine ultrasound examination at 6–7 weeks varies from country to country.The disadvantages of performing this examination routinely are related to cost, errors in diagnosing ectopic pregnancies that in fact are intrauterine, increased training requirements for providers, and potential biologic hazards to the fetus that are presently unknown.