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Journal of Human Lactation
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Initiation and Frequency of Pumping and Milk Production in Mothers of Non-Nursing Preterm Infants

Pamela D. Hill, PhD, RN

University of Illinois at Chicago, College of Nursing, Quad Cities Regional Program, 555 6th Street, Suite 500, Moline, IL 61265, USA.

Jean C. Aldag, PhD, RN

College of Medicine, University of Illinois at Peoria

Robert T. Chatterton, PhD

Northwestern University, Chicago

This secondary data analysis examined if time of initiation of milk expression and pumping frequency influenced milk weight weeks 2-5 postpartum. Of the 39 subjects in the convenience sample, 20 were in the early initiating (EI) group, (n = 12 high frequency [HF], n = 8 lowfrequency [LF]), and 19 were in the late initiating (LI) group, (n= 7HF, n = 12LF). The EI group initiated pumping = 48 hours after birth; the HF group pumped a minimum of 6.25 times daily. A two-way analysis of variance indicated that milk weight was significantly higher in the HF as compared to the LF group. While there was no significant difference in milk weight between the EI and LI groups, therewas a significant interaction between frequency and initiation. Milk weight for the LF group appeared to be positively influenced by the initiation of mechanical expression soon after birth.

Key Words: preterm infants • milk production • frequency of pumping • initiation of pumping • breast milk

Journal of Human Lactation, Vol. 17, No. 1, 9-13 (2001)
DOI: 10.1177/089033440101700103
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