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What is a 3D or 4D ultrasound? Keepsake ultrasound pictures and videos are popular, but many healthcare providers advise against them. Here's why. Medically reviewed by Cheryl Axelrod, M.D., ob-gyn Written by Deepi Brar | Mar 3, 2021 Photo credit: iStock What are 2D, 3D, and 4D ultrasounds? What ultrasounds will I have during pregnancy? usg 12 minggu 4d