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Ultrasound for dating

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An increased NT measurement does not always mean the baby has a problem but it does increase the risk.There are established and strict criteria for the accurate measurement of the nuchal translucency.We may need a closer look at your baby, ovaries or cervix.Transvaginal ultrasound during all stages of pregnancy, including the first trimester, is safe and will not harm either you or your baby.The gel helps improve contact between the probe and your skin.

Normally the amount of fluid is small, producing a thin NT measurement.You will always have a choice about whether transvaginal ultrasound is performed.If you have concerns about transvaginal ultrasound, please discuss this with your sonographer.For example, this test will not tell us "no, the baby definitely does not have trisomy 13, 18 or 21" and, this test will not tell us β€œyes, your baby definitely has trisomy 13, 18 or 21”.To get a definitive 100% answer for chromosome abnormalities including Down syndrome, a prenatal diagnostic test is needed (chorionic villus sampling or amniocentesis).Nuchal translucency ultrasound alone can also provide this risk assessment, but it is not as accurate as combined first trimester screening.