What tests must a fetus undergo

Patient's question:

Hello, I am 31 weeks pregnant. To better combine prevention and treatment, I think it is necessary to do some tests for the fetus. If so, how are the main tests for some essential prenatal examinations, such as genetic diseases? Thank you

Doctor's answer:

Hello; With the continuous development of technology, in addition to prenatal screening, non-invasive prenatal genetic testing can now be used to detect Down syndrome and abnormalities in chromosomes 18 and 13. Non-invasive prenatal genetic testing can detect over 99% of Down syndrome-affected fetuses. Like prenatal screening, it only requires a blood draw from the arm for testing, avoiding the increased risk of miscarriage associated with amniocentesis or chorionic villus sampling. For women of advanced maternal age or those at high risk for prenatal screening, non-invasive prenatal genetic testing is another new option for undergoing amniocentesis.
It is recommended that you visit the hospital for prenatal check-ups during pregnancy. Ultrasound and other tests can help determine if the fetus is developing normally.