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Advanced Ultrasound – This exam is similar to the standard ultrasound, but the exam targets a suspected problem and uses more sophisticated equipment.Doppler Ultrasound – This imaging procedure measures slight changes in the frequency of the ultrasound waves as they bounce off moving objects, such as blood cells.

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

Normal uterine volume is less than 100 cc (nulliparous patients) and less than 125 cc (multiparous patients).

There are basically seven different ultrasound exams, but the principle process is the same.

The different types of procedures include: Transvaginal Scans – Specially designed probe transducers are used inside the vagina to generate sonogram images.

These guidelines describe the indications and key elements of 4 major types of obstetric ultrasounds, specifically the first trimester ultrasound, standard second or third trimester ultrasound, and limited and specialized ultrasound examinations.

The first ­trimester basic ultrasound is typically performed to confirm a viable intrauterine pregnancy.The basic obstetric ultrasound examination provides an accurate and safe clinical assessment of the gravid uterus throughout a woman’s pregnancy including characterizing pregnancy location, identifying the number of embryos present, and aiding in the prenatal diagnosis of fetal anomalies.In 2013, the American Institute of Ultrasound in Medicine (AIUM), in conjunction with the American College of Radiology (ACR) and the American College of Obstetricians and Gynecologists (ACOG), released updated Practice Guidelines for Performance of Obstetric Ultrasound Examinations.Place a small amount of ultrasonic coupling gel on the tip of the transvaginal transducer. After lubricating the vaginal opening, gently insert the transducer into the vagina.Visualize the longitudinal plane of the uterus (sagital section) and evaluate its' size.These early ultrasounds provide comfort and reassurance to the expectant mother.

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