Patient's question:
Here is the English translation of the provided text:At 22 weeks of pregnancy, I had a 3D color ultrasound screening for fetal anomalies. The doctor said there were no problems. Could you please advise if it's necessary to have a 4D color ultrasound at 26 weeks? Currently, the hospital where I get my prenatal care does not offer 4D color ultrasound services.
Doctor's answer:
It is recommended to have a 4D ultrasound at 32 weeks as part of the tiered screening guidance:Tiered Screening System:
1. Tier 1 Screening System: This is a clinical diagnostic screening that involves careful observation and health examinations of the pregnant woman and her husband. It combines factors such as age, medical history, previous birth history, family history of hereditary diseases, and exposure to teratogenic factors to identify high-risk or low-risk pregnant women.
2. Tier 2 Screening System: This is a laboratory screening that tests hematological indicators, ultra-sensitivity markers, and ultra-sensitivity indicators in the pregnant woman and/or her husband to pinpoint high-risk pregnant women.
3. Tier 3 Screening System: This is a medical imaging screening, primarily demonstrated in the defense line of fetal MRI examinations.