"Ultrasound scans, whether 2D, 3D or 4D, all work in the same way," says Rachel. "Quite simply, the scanning probe sends out ...
Article medically reviewed by Lesley Bland, BA (Hons), BSc (Hons) Midwifery Studies who is a Registered Midwife and Consultant Midwife for My Expert Midwife. At 20 weeks pregnant, you are halfway ...