Gu Lei, Dong Le, Chen Hongyu
Department of Breast and Thyroid Surgery, Northwest Women and Children's Hospital, Xi'an, Shaanxi, China.
Department of Ophthalmology, Xi'an No.9 Hospital, Xi'an, Shaanxi, China.
Int Breastfeed J. 2025 Sep 26;20(1):70. doi: 10.1186/s13006-025-00746-0.
This study explored the correlation between breast milk intake and sucking time during a single breastfeeding session, and analyzed additional factors influencing infant milk intake.
A cross-sectional survey was conducted from March to July 2024, enrolling 162 mother-infant dyads with infants aged 1 to 12 months. During breastfeeding observations, sucking time was recorded, and milk intake was measured using the test-weighing method. A self-designed questionnaire was used to collect data on maternal and infant health status and feeding practices. Statistical analysis included descriptive statistics (medians and interquartile ranges for non-normally distributed data), non-parametric tests for group comparisons, Pearson correlation, and multiple linear stepwise regression.
Breast milk intake was significantly positively correlated with sucking time (r = 0.57, P < 0.05). The median [IQR] volume of milk intake from the right breast was significantly higher than that from the left breast (60.0 [35.0-85.0] g vs. 48.0 [28.0-70.0] g, P < 0.05). Infants of full-time housewives or mothers on maternity leave exhibited a higher median average milk intake rate than those of working mothers (7.8 [4.5-10.5] g/min vs. 6.5 [3.8-9.0] g/min, P = 0.06). Average milk intake rate was significantly higher in infants aged 5-12 months compared to 1-4 months (median [IQR]: 7.9 [5.0-11.0] g/min vs. 6.5 [3.9-8.8] g/min, P < 0.05). Other factors, including infant sex, overall infant age (when not stratified), birth weight, 24-hour breastfeeding frequency, maternal BMI, parity, maternal age, and maternal occupation (for milk intake volume) showed no significant associations with milk intake volume or intake rate in univariate analyses (all P > 0.05).
Sucking time, current infant body weight, and the breast side used for feeding are key factors influencing breast milk intake during a single breastfeeding session. Further research is warranted to investigate the effects of other factors such as feeding patterns and breastfeeding intervals on milk intake.
本研究探讨了单次母乳喂养期间母乳摄入量与吸吮时间之间的相关性，并分析了影响婴儿奶量摄入的其他因素。
于2024年3月至7月进行了一项横断面调查，纳入了162对母婴，婴儿年龄为1至12个月。在母乳喂养观察期间，记录吸吮时间，并使用测试称重法测量奶量摄入。使用自行设计的问卷收集有关母婴健康状况和喂养方式的数据。统计分析包括描述性统计（非正态分布数据的中位数和四分位数间距）、用于组间比较的非参数检验、Pearson相关性分析和多元线性逐步回归分析。
母乳摄入量与吸吮时间呈显著正相关（r = 0.57，P < 0.05）。右乳的奶量摄入中位数[四分位数间距]显著高于左乳（60.0 [35.0 - 85.0] g对48.0 [28.0 - 70.0] g，P < 0.05）。全职家庭主妇或休产假母亲的婴儿，其平均奶量摄入率中位数高于职业母亲的婴儿（7.8 [4.5 - 10.5] g/分钟对6.5 [3.8 - 9.0] g/分钟，P = 0.06）。与1至4个月的婴儿相比，5至12个月婴儿的平均奶量摄入率显著更高（中位数[四分位数间距]：7.9 [5.0 - 11.0] g/分钟对6.5 [3.9 - 8.8] g/分钟，P < 0.05）。在单因素分析中，其他因素，包括婴儿性别、婴儿总体年龄（未分层时）、出生体重、24小时母乳喂养频率、母亲BMI、产次、母亲年龄和母亲职业（对于奶量摄入），与奶量摄入量或摄入率均无显著关联（所有P > 0.05）。
吸吮时间、婴儿当前体重以及喂奶所用乳房侧别是单次母乳喂养期间影响母乳摄入量的关键因素。有必要进一步研究喂养方式和母乳喂养间隔等其他因素对奶量摄入的影响。
