Document Detail

Effect of weight and adiposity at conception and wide variations in gestational dietary intake on pregnancy outcome and early postnatal performance in young adolescent sheep.
MedLine Citation:
PMID:  19794151     Owner:  NLM     Status:  MEDLINE    
Nutritional backgrounds prior to pregnancy may interact with subsequent gestational intake to influence pregnancy outcome, particularly in young, growing adolescents. To investigate this interaction, singleton pregnancies were established in two groups of adolescent sheep of identical age but different initial weight and adiposity score, classified as good (G) and poor (P) body mass index (BMI). Thereafter, ewes were offered either an optimal control (C) intake to maintain adiposity throughout pregnancy, undernourished (UN) to maintain weight at conception but deplete maternal body reserves, or overnourished (ON) to promote rapid maternal growth and adiposity, resulting in a 2 x 3 factorial design. Gestation length was independent of BMI and reduced in ON dams. Average placental and lamb birth weights were influenced by initial BMI (G > P) and gestational intake (C > UN > ON), with the highest incidence of growth restriction in ON groups. Metabolic challenges at two thirds of gestation revealed enhanced insulin insensitivity in ON dams (higher glucose postinsulin challenge and higher insulin postglucose challenge), but nevertheless fetal growth was constrained. Initial colostrum yield, total IgG, and nutrient supply were reduced in ON groups, but these low-birth-weight lambs exhibited rapid catch-up growth to weaning. Thus, both maternal BMI at conception and gestational intake have a profound influence on pregnancy outcome in young, putatively growing adolescent sheep and may have implications for the nutritional management of pregnant adolescent humans.
Jacqueline M Wallace; John S Milne; Raymond P Aitken
Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't     Date:  2009-09-30
Journal Detail:
Title:  Biology of reproduction     Volume:  82     ISSN:  1529-7268     ISO Abbreviation:  Biol. Reprod.     Publication Date:  2010 Feb 
Date Detail:
Created Date:  2010-01-22     Completed Date:  2010-03-30     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0207224     Medline TA:  Biol Reprod     Country:  United States    
Other Details:
Languages:  eng     Pagination:  320-30     Citation Subset:  IM    
Rowett Institute of Nutrition and Health, University of Aberdeen, Bucksburn, Aberdeen, United Kingdom.
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MeSH Terms
Animal Nutritional Physiological Phenomena
Animals, Newborn / growth & development,  physiology
Birth Weight
Blood Glucose / analysis
Body Mass Index
Body Weight*
Colostrum / chemistry,  immunology
Embryo Transfer / veterinary
Fatty Acids, Nonesterified / blood
Immunoglobulin G / analysis
Insulin / blood,  diagnostic use
Lipids / blood
Maternal Nutritional Physiological Phenomena
Organ Size
Placenta / anatomy & histology
Pregnancy Outcome / veterinary*
Sheep / physiology*
Reg. No./Substance:
0/Blood Glucose; 0/Fatty Acids, Nonesterified; 0/Immunoglobulin G; 0/Lipids; 11061-68-0/Insulin

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

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