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Journal of Human Lactation
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Efficacy of Breast Milk Expression Using an Electric Breast Pump

Leon R. Mitoulas, PhD

Faculty of Life and Physical Sciences, The University of Western Australia, 35 Stirling Highway, Crawley, Western Australia 6009, Australia

Ching Tat Lai, MSc

Lyle C. Gurrin, PhD

Women and Infants Research Foundation and The University of Western Australia Department of Obstetrics and Gynaecology, King Edward Memorial Hospital, Subiaco, Western Australia

Michael Larsson, MBA

Medela AG, Baar, Switzerland

Peter E. Hartmann, PhD

The University of Western Australia, Crawley, Western Australia

The authors compared breastfeeding and expression characteristics in 30 mothers of exclusively breastfeeding, healthy term infants. Mean (± SD)volume per breastfeed from one breast was 71.8 ± 26.3 mL, and mean duration per breastfeed for one breastwas 16.6 ± 10.5 minutes. Mean volume of milk expressed in 5 minutes from one breast was 60.6 ± 39.0 mL and corresponded to the expression of 99.4 ± 82.6% of the milk stored in the breast. The rate of milk expression differed greatly between mothers (P = .0001)b ut remained constant for the first 2.5 minutes before decreasing with time (P = .0001). These results show the mean breastfeed volumewas similar to the volume of milk expressed in a 5-minute period. Furthermore, this study is the first to establish protocols that allow for the objective determination of breast pump efficacy.

Key Words: breast milk expression • electric breast pump • breastfeeding • breast pump efficacy

Journal of Human Lactation, Vol. 18, No. 4, 344-352 (2002)
DOI: 10.1177/089033402237907
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J. C. Kent, L. R. Mitoulas, M. D. Cregan, D. T. Ramsay, D. A. Doherty, and P. E. Hartmann
Volume and Frequency of Breastfeedings and Fat Content of Breast Milk Throughout the Day
Pediatrics, March 1, 2006; 117(3): e387 - e395.
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