How accurate are dating scans at 16 weeks

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Because ultrasound should only be used when medically indicated, many healthy pregnancies will not require an ultrasound.

The average number of ultrasounds varies with each healthcare provider.

If you receive an ultrasound exam after week 6, your healthcare provider will begin to be concerned, if there is no gestational sac.

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

Ultrasound dating of conception is not reliable for determining paternity because the ultrasound can be off by at least 5-7 days in early pregnancy.

You may have an ultrasound between 18 to 20 weeks to evaluate dates, a multiples pregnancy, placenta location or complications.

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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