Down syndrome in pregnancy

Hi doctor, I’m 15 weeks pregnant and suffering from down syndrome in pregnancy . My doctor did the Nuchal scan at 12 weeks and it was 1.6 mm and everything is okay. The doctor was supposed to do the maternal serum blood test, but he didn’t do and its not possible now at 15 weeks of pregnancy. Doctor told me to do the amniocentesis or Triple test? I checked on internet that Nuchal scan in 1st trimester blood test gives 95% certainty. With my nuchal scan and triple test. Will it be okay if I don’t have to do the amniocentesis as its an invasive procedure?


Down syndrome in pregnancy
Obstetrics & Gynae

Answer ( 1 )

  1. Hello Dear,

    Thank you for writing to us at MediMetry.

    An NT of less than 3.5mm is considered normal when your baby measures between 45mm (1.8in) and 84mm (3.3in). The NT normally grows in proportion with your baby. The baby with a normal NT of 1.3mm will probably be low risk. However, an increased NT does not mean there is definitely a problem. Some babies without Down's have increased fluid, too. The only way to know for certain if your baby has Down’s or another chromosomal abnormality is to have a diagnostic test, such as CVS or amniocentesis. As these tests carry a small risk of miscarriage, this decision can be very difficult, but you don't have to decide in a hurry. At 16-18 week get ur quadruple test, (using α-fetoprotein, hCG, uE3, and inhibin test ) done and level 2 scan at 18-20 week.. If any doubt arises with quadruple test at 16 week , u have to get ur amniocentesis done .

    Hope this answers your query. Feel free to write back to us with follow-up questions.
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