hello4dDNA Gender Testing at 8 weeks with SneakPeek Clinical! Latest 3D4D technology! Military discount! Gender Reveal items in stock! Seating for 10+! Located in the Greenbrier section of Chesapeake, near Chesapeake RegionalWhat is 2D, 3D and 4D? 2D is the standard black and white ultrasound. This type of ultrasound is recommended for babies that are 20 weeks and younger. 2D is the preferred type of imaging