Down Syndrome Screening and 4D Ultrasound Examination

Question

Now that I am five and a half months pregnant, can I still have a Down syndrome screening? Do I need to have a Down syndrome screening if I do a 4D ultrasound examination now?

Answer

Based on the description, five and a half months pregnant is already past the recommended time for Down syndrome screening. It is suggested to undergo a 4D ultrasound examination, but this test cannot determine whether the fetus has Down syndrome.