35 weeks old nt test is normal still need to do non-invasive testing, need to be under the guidance of the doctor for screening.
NT refers to the thickness of fetal nuchal translucency, which is normally 2.5~3mm. 35 years old is an advanced maternal age, and due to the increased risk of fetal abnormalities, even if the NT test is normal, it is recommended that amniocentesis be performed to definitively rule out the risk of chromosomal abnormalities in the fetus. For those who cannot accept the risk of amniocentesis, non-invasive prenatal testing (NPT) can be performed under medical supervision.
Non-invasive prenatal testing is a prenatal screening tool, when a positive result can only indicate a high risk, not a definitive diagnosis, but also amniocentesis to diagnose. For pregnant women with chromosomal abnormalities, fetal structural malformations and other special circumstances, can not be used non-invasive prenatal testing, need to carry out amniocentesis for a clear diagnosis, specific can consult a professional physician’s opinion.