Figure 5

Milk duct diameter measured with ultrasound and milk flow rate recordings by the Showmilk in a mother expressing one breast with an electric pump. Milk duct diameter (grey) recorded by ultrasound in the right breast and milk flow rate (black) recorded in the expressed left breast of a mother by the Showmilk. Increases in milk duct diameter correspond to increases in milk flow rate (↓). A pre-milk ejection (*) can be identified as a short increase in flow rate before a greater increase in flow rate in the first minute of expression. The pre-milk ejection corresponds to a decrease in duct diameter that is most likely the end of a spontaneous milk ejection that occurred before pumping.