Comparison of the Patterns of Milk Ejection During Repeated Breast Expression Sessions in Women
- 1 August 2011
- journal article
- research article
- Published by Mary Ann Liebert Inc in Breastfeeding Medicine
- Vol. 6 (4), 183-190
- https://doi.org/10.1089/bfm.2011.0014
Abstract
This study aimed to investigate the consistency of milk ejections and milk expression characteristics within mothers at repeated expression sessions. Twenty-five breastfeeding mothers expressed their breasts simultaneously on three occasions within 3 weeks, and follow-up visits were performed at 6, 9, and 12 months of lactation. During the 15-minute expression, milk was collected onto a continuous weigh balance to measure milk flow rate. The number of milk ejections was similar at the three sessions (5.1±2.0), decreasing at the 12-month follow-up (3.3±1.2). Mothers had a similar pattern of milk ejection at each session. The time that each milk ejection occurred was consistent for the first 9 months of lactation. Of the four milk ejection patterns identified, each removed a similar percentage of available milk but varied in the time to reach 80% of the total expression volume. The first two milk ejections produced the greatest percentage (62%) of total milk volume during breast expression. For each individual mother, the timing, pattern, and number of milk ejections were consistent, suggesting a predetermined release of oxytocin. In light of the innate oxytocin release and milk removal characteristics in women, there is potential for individual tailoring of the duration of expression.Keywords
This publication has 22 references indexed in Scilit:
- Using milk flow rate to investigate milk ejection in the left and right breasts during simultaneous breast expression in womenInternational Breastfeeding Journal, 2009
- Importance of Vacuum for Breastmilk ExpressionBreastfeeding Medicine, 2008
- Volume and Frequency of Breastfeedings and Fat Content of Breast Milk Throughout the DayPediatrics, 2006
- Milk Flow Rates Can Be Used to Identify and Investigate Milk Ejection in Women Expressing Breast Milk Using an Electric Breast PumpBreastfeeding Medicine, 2006
- Anatomy of the lactating human breast redefined with ultrasound imagingJournal of Anatomy, 2005
- Response of Breasts to Different Stimulation Patterns of an Electric Breast PumpJournal of Human Lactation, 2003
- Characteristics of the spontaneous milk ejecting activity occurring during human lactationjpme, 1993
- Release of oxytocin and prolactin in response to suckling.BMJ, 1983
- ELECTROPHYSIOLOGICAL RECORDINGS FROM OXYTOCINERGIC NEURONES DURING SUCKLING IN THE UNANAESTHETIZED LACTATING RATJournal of Endocrinology, 1981
- EFFECTS OF VOLUME AND DISTRIBUTION OF MILK ON THE OXYTOCIN-INDUCED CONTRACTION OF THE LACTATING RAT MAMMARY GLAND IN VIVOJournal of Endocrinology, 1971