Down syndrome 700 should refer to a Down syndrome screening of 1:700, which is not a serious value. Down’s syndrome screening is a test that measures maternal serum concentrations of alpha-fetoprotein, chorionic gonadotropin, and free estriol in combination with maternal age and weight to determine the probability that the fetus has trisomy 21. A value of 1:270 is usually the threshold below which there is a low risk and above which there is a high risk. Therefore, when the value of 1:700 suggests a low risk, there is no need to worry too much, usually there is no problem, in the follow-up of the obstetric examination of regular ultrasound examination, etc., if found fetal abnormalities, timely search for the cause of the disease, timely treatment. It should be noted that although the Down’s syndrome test indicates a low risk, the accuracy of Down’s syndrome testing is not 100% guaranteed at this time. If you are not sure, you can undergo further non-invasive DNA testing or amniocentesis for confirmation under the guidance or advice of your doctor.