Does the Down syndrome screening have any requirements for weight?

Patient's question:

I am more than 3 months pregnant and will go to the hospital tomorrow for the triple screen test. However, during my pregnancy, my nutrition has been a bit off, and my weight has increased a bit. I would like to understand if there are any weight-related recommendations for the triple screen test.

Doctor's answer:

The full name of Down syndrome screening is prenatal screening for Down syndrome. Down syndrome screening is a test that can eliminate the possibility of the fetus suffering from Down syndrome, especially for elderly mothers. This test should be performed during pregnancy. The weight of the pregnant woman has a certain interference on the test results. The factors that interfere with the Down screening value mainly include the mother's age, gestational age, fetal alpha protein excreted by the fetus, human chorionic gonadotropin excreted by the placenta, drug factors, and intergenerational inheritance factors, etc. Down syndrome screening does not require fasting, but it is related to the menstrual cycle, weight, height, accurate gestational age, and gestational age size. It is best to consult a doctor for other preparations before the examination.

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