Document Detail

A longitudinal study of urinary calcium, magnesium, and zinc excretion in lactating and nonlactating postpartum women.
MedLine Citation:
PMID:  7702019     Owner:  NLM     Status:  MEDLINE    
Postpartum lactating (n = 12) and nonlactating (n = 11) women and never pregnant women (n = 14) collected urine samples and diet records 2 d each month for 6 mo to determine whether postpartum women conserved urinary calcium, magnesium, or zinc. Mean daily excretions were analyzed by repeated-measures analysis of variance and covariance to assess group and time effects. Lactating women excreted less urinary calcium (1-6 mo) than never pregnant (n = 8) and nonlactating (n = 4) women who did not use oral contraceptives (P < 0.01); however, excretion rose (P < 0.05) by 3 mo postpartum. In the nonlactating and never pregnant groups, women using oral contraceptives excreted less urinary calcium than the other women (P < 0.01). Lactating women excreted less urinary zinc (1-6 mo) than did control and non-lactating women (P < 0.01). Mechanisms may possibly be operating during lactation that depress urinary calcium for > or = 2 mo and urinary zinc < or = 6 mo postpartum.
C J Klein; P B Moser-Veillon; L W Douglass; K A Ruben; O Trocki
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Publication Detail:
Type:  Clinical Trial; Comparative Study; Controlled Clinical Trial; Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  The American journal of clinical nutrition     Volume:  61     ISSN:  0002-9165     ISO Abbreviation:  Am. J. Clin. Nutr.     Publication Date:  1995 Apr 
Date Detail:
Created Date:  1995-05-01     Completed Date:  1995-05-01     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  0376027     Medline TA:  Am J Clin Nutr     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  779-86     Citation Subset:  AIM; IM    
Department of Nutrition and Food Science, University of Maryland, College Park 20742.
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MeSH Terms
Analysis of Variance
Calcium / urine*
Contraceptives, Oral / pharmacology
Eating / physiology
Lactation / physiology,  urine*
Longitudinal Studies
Magnesium / urine*
Postpartum Period / physiology,  urine*
Zinc / urine*
Reg. No./Substance:
0/Contraceptives, Oral; 7439-95-4/Magnesium; 7440-66-6/Zinc; 7440-70-2/Calcium

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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