Can you do the Down syndrome screening at 3 months of pregnancy?

Patient's question:

No

Doctor's answer:

You can have the Down syndrome screening between weeks 14-18 of pregnancy. Down syndrome screening is a non-invasive test method for the fetus, which is economical, simple, safe, and conducted between weeks 14-18. It only requires 2 milliliters of blood drawn from the pregnant woman's vein after fasting for 12 hours. The results can be obtained 2-3 weeks after the blood draw. If the serum screening is positive, further amniocentesis is needed to confirm the diagnosis and determine the treatment plan. Down syndrome screening can also detect high-risk pregnancies for neural tube defects, 18 trisomy, and 13 trisomy.
Down syndrome screening cannot be done while eating or drinking.
On the other hand, the 4D ultrasound is performed between weeks 22-26 of pregnancy for a 4D color Doppler ultrasound to check for fetal structural abnormalities and the development of major organs.
Therefore, these two tests are conducted based on the duration of the pregnancy and cannot be done simultaneously.