Screening of "fetal neck zona pellucida"

The screening of the "fetal neck zona pellucida" is the first screening for Down's syndrome children in early pregnancy. This is the first fetal screening program that pregnant women will encounter in early pregnancy. The accuracy of screening Down's children, As high as 85-90%, it can be said that it is the first choice for screening now. It is a screening test for Down's disease in the first trimester. The duration of the first trimester is 11 to 13 weeks. The cervical zona pellucida refers to the void in the subcutaneous fluid behind the fetal neck. When performing an ultrasound scan, the physician will measure the thickness of the gap between the skin and tissue in detail. For fetuses with abnormal chromosomes, the cervical zona pellucida will significantly increase Thick, especially in children with Down syndrome. Down's disease is usually more likely to occur in older women. Medical literature has confirmed that the thicker the zona pellucida in the back of the fetus, the higher the chance of chromosomal abnormalities.