BPS and 3D/4D Ultrasound

Hi mga mumsh. Im 38wks1day EDD is Aug. 29. Plan namin magpa 3D/4D ni Partner this weekend, but at the same time magpa-BPS to check our baby's status. Question is pwede bang 3D/4D nlang since makkita din naman si baby dun? Or may difference padin kapag BPS. Enlighten me pls. Thank you! :) #1stpregnnt