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Lactation - Wikipedia
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Ultrasound imaging of milk ejection in the breast of lactating women.
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Description:Currently, the methods for assessing milk ejection in women include serial sampling of plasma oxytocin and measurement of intraductal pressure, both of which are invasive and may induce stress. We hypothesized that milk ejection would cause an increase in milk-duct diameter that could be observed noninvasively with ultrasound, and this could be used to investigate the physiology of milk ejection in women. One milk duct was scanned in the unsuckled breast in 2 groups of mothers: A duct also was monitored for a 5-minute period on 2 separate days in the absence of factors that may induce milk ejection in group EB to provide a baseline duct diameter. Milk intake at a breastfeed was measured by test weighing. Multiple increases and decreases mean: