Document Detail

Labor does not affect the neonatal absolute nucleated red blood cell count.
MedLine Citation:
PMID:  14655093     Owner:  NLM     Status:  MEDLINE    
We investigated whether the presence or absence of physiologic labor may affect the neonatal nucleated red blood cell (RBC) count. We compared absolute nucleated RBC counts taken at approximately 6 hours of life in term infants born by elective cesarean delivery without trial of labor ( n = 32) and in vaginally delivered infants ( n = 28). Venous blood samples were analyzed and differential cell counts were performed manually; absolute nucleated RBC were counted and expressed as an absolute number. There were no significant differences between groups in birth weight, gestational age, maternal age, gravidity, parity, maternal analgesia during labor, 1- and 5-minute Apgar scores, and infant sex. There was a significantly higher hematocrit and RBC count in the vaginally delivered group as compared with the cesarean group. The absolute nucleated RBC, corrected leukocyte and lymphocyte, and platelet counts were strikingly similar in both groups. We conclude that labor does not affect the neonatal nucleated RBC count. This finding supports the speculation that physiologic labor does not induce a fetal hypoxemia severe or prolonged enough to produce hematological evidence of increased erythropoiesis.
Galit Sheffer-Mimouni; Francis B Mimouni; Ronit Lubetzky; Michael Kupferminc; Verda Deutsch; Shaul Dollberg
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Publication Detail:
Type:  Comparative Study; Journal Article    
Journal Detail:
Title:  American journal of perinatology     Volume:  20     ISSN:  0735-1631     ISO Abbreviation:  Am J Perinatol     Publication Date:  2003 Oct 
Date Detail:
Created Date:  2003-12-05     Completed Date:  2004-03-24     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  8405212     Medline TA:  Am J Perinatol     Country:  United States    
Other Details:
Languages:  eng     Pagination:  367-71     Citation Subset:  IM    
Department of Obstetrics and Gynecology, Lis Maternity Hospital, Tel Aviv, Israel.
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MeSH Terms
Cesarean Section
Delivery, Obstetric*
Erythrocyte Count*
Infant, Newborn / physiology*
Labor, Obstetric / physiology*
Prospective Studies

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