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Relationships Between Fluid Intake, Breast Milk Volume, and Urine Volume in Lactating Women
Author(s) -
McKenzie Amy,
Perrier Erica,
Jimenez Liliana,
Armstrong Lawrence
Publication year - 2015
Publication title -
the faseb journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.709
H-Index - 277
eISSN - 1530-6860
pISSN - 0892-6638
DOI - 10.1096/fasebj.29.1_supplement.133.3
Subject(s) - urine , breast milk , osmole , zoology , fluid intake , medicine , gynecology , chemistry , biology , biochemistry
The purpose of this investigation was to determine if a relationship existed between total fluid intake (TFI; volume of fluids consumed from drinking water and other beverages) and breast milk volume (BM vol ) in lactating women, with follow up evaluations of urine volume (U vol ), urine concentration, and total fluid output (TFO; U vol +BM vol ). Methods Eighteen lactating women (3.3±0.7 weeks postpartum, 31±3y, 1.66±0.07m, 72.06±17.26kg) recorded TFI and BM vol (estimated by measuring body mass of newborn immediately before and after nursing at each feeding) for 24h. Women also collected their urine for measurement of 24h U vol and osmolality (U osm ). Results No significant relationship existed between TFI and BM vol (r 2 =0.0235, p=0.544); however, there was a significant relationship between TFI and U vol (r 2 =0.5006, p=0.001) and TFI and TFO (r 2 =0.4857, p=0.001). Those who did not meet the European Food Safety Authority reference value for TFI (2.16L/d) had higher 24h U osm (621±60 vs. 445±68 mOsm·kg ‐1 , p=0.069) and lower 24h U vol (1.646±0.243 vs 2.352±0.331 L, p=0.1046). Conclusion These findings demonstrate that in lactating women, there is no relationship between TFI and BM vol , indicating that BM vol is defended over a wide range of TFI (1.212‐3.998L). However, this defense of BM vol may come at the expense of lower U vol and higher U osm for the mother. Supported by Danone Research.