Methods of milk expression for lactating women

Area of Science:

• Perinatal care
• Lactation science
• Infant nutrition

Background:

• Breastfeeding is crucial, but not all infants can feed directly.
• Evaluating various milk expression methods is essential for supporting mothers and infants.
• This review updates previous findings on milk expression techniques.

Purpose of the Study:

• To assess the acceptability, effectiveness, safety, and cost of different milk expression methods.
• To analyze the impact of expression methods on milk composition and contamination.
• To provide evidence-based guidance for milk expression practices.

Main Methods:

• Systematic review of randomized and quasi-randomized trials.
• Searched multiple databases including Cochrane Pregnancy and Childbirth Group's Trials Register and CINAHL.
• Included 34 studies with 1998 participants, analyzing 17 trials with 961 participants.

Main Results:

• Limited comparable data prevented meta-analysis; findings often based on single studies.
• Maternal satisfaction varied, with hand expression instructions perceived as clearer than pump instructions.
• Early initiation of pumping, relaxation music, breast warming, and massage increased milk volume.
• No significant differences found in milk contamination or nipple pain between methods.
• Some methods showed differences in milk sodium, potassium, protein, and fat content, but not energy.

Conclusions:

• The optimal milk expression method is individualized, depending on time post-birth and purpose.
• Low-cost interventions (early initiation, relaxation, massage, hand expression) can be effective alternatives to large electric pumps.
• Caution is advised due to small sample sizes, high variability, and potential manufacturer bias in studies.