The chance of getting pregnant with twins is very low and it is very painful for expectant mothers. Twin pregnancy is a high-risk pregnancy, so mothers of this type should pay extra attention during pregnancy and undergo screening experiments during prenatal check ups. How to do Down syndrome screening for twins?
Generally, mothers who are four months pregnant can undergo Down syndrome screening experiments. This testing method has little impact on the fetus and is also economical, convenient, and fast. During the examination, only 2ml of venous blood needs to be drawn, and pregnant women can receive the report 2-3 weeks after the blood is drawn. If the serum screening is positive, further testing is required.
If there are issues with serum screening, an amniocentesis test is also required. However, before the examination, pregnant mothers should remember to conduct experiments on an empty stomach, as satiety can affect blood viscosity, hemoglobin, white blood cell count, and other test results, which can be inaccurate and affect the final outcome. This examination can prevent the occurrence of congenital idiocy and improve the birth rate of healthy infants.
The steps of Down syndrome examination are also relatively simple, just extracting the serum of pregnant women, testing the concentration of alpha placental globulin, and then calculating the risk index of twin birth based on the pregnant mother's pregnancy cycle, weight, due date, and age. During the inspection, 15-20 weeks is more suitable, and 80% of the cases can be detected.
