The figures were applied to this fictitious population of 50,000 people. The incidence of trisomy 21 in this group was 1 in 394. The results presented in this visual are based on the sensitivity and specificity of eFTS and NIPT from actual Ontario pregnancies with an estimated date of delivery between September 2016 and March 2021 that underwent prenatal screening (twins were excluded). Talk to your provider about how they plan to give you these results. Keep in mind that your practitioner may not get the report right away. The results will be shared with your health-care practitioner within approximately 5 working days. You will be asked about your racial identity, diabetes status, smoking history in the pregnancy, weight and whether the pregnancy happened through in vitro fertilization. Your health-care practitioner will ask you some questions about you that improve the accuracy of test. The blood test for eFTS will measure the amount of 3 or 4 chemicals made by your pregnancy. When there is more fluid than what we typically see, there is an increased chance for trisomy 21, trisomy 18 and other conditions. This pocket of fluid is measured during the ultrasound. The nuchal translucency (NT) refers to the pocket of fluid at the back of the baby's neck. The egg may be your own or from a donor.ฤก1-14 week (nuchal translucency) ultrasound result You have a higher chance for chromosome differences like trisomy 21 and trisomy 18 as you get older. If you got pregnant through in vitro fertilization, it is the age of the egg that is used. This screening test will combine all the information below to tell you about the chance to have a baby with trisomy 21 and trisomy 18:
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