The NF value indicates the thickness of the skin and tissue at the back of the neck of the fetus. Fetal nuchal thickness is one of the more sensitive and important ultrasound genetic markers for mid-pregnancy Down’s syndrome screening.
At 16-24 weeks of pregnancy, fetal nuchal thickness should normally be less than 6 mm. If the fetal nuchal thickness is greater than or equal to 6 mm, it is considered to be thickening of the fetal nuchal thickness, which means that the risk of the fetus suffering from Down’s syndrome will increase exponentially.
If the NF value is found to be abnormal, amniocentesis or non-invasive DNA test should be conducted in time for further diagnosis and to clarify whether the fetus has chromosomal abnormalities as well as developmental malformations.
Pregnant mothers are advised to relax during pregnancy, eat more nutritious food, take folic acid supplements under the guidance of a doctor, take pregnancy tests on time, and go to the hospital for examination and treatment if there are any uncomfortable symptoms.