Figure 6From: The use of ultrasound to identify milk ejection in women – tips and pitfallsUltrasound image of a milk ducts in the human lactating breast prior to milk ejection. Two main milk ducts are displayed on ultrasound as a hypoechoic (black) structure with echogenic walls (white). Duct 1 is more superficial (1.95 mm) than Duct 2 (3.72 mm). Duct 2 has three merging branches.Back to article page