Additional File 1.

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Ultrasound video of milk ejection in the unsuckled breast during a breastfeed. Substantial duct dilation accompanied by milk flow is evident at milk ejection. Milk is flowing towards the right upper corner of the image where the nipple is situated.

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Geddes International Breastfeeding Journal 2009 4:4   doi:10.1186/1746-4358-4-4