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Maternal Effects in Mammals$
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Dario Maestripieri and Jill M. Mateo

Print publication date: 2009

Print ISBN-13: 9780226501192

Published to Chicago Scholarship Online: February 2013

DOI: 10.7208/chicago/9780226501222.001.0001

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Effects of Intrauterine Position in Litter-Bearing Mammals

Effects of Intrauterine Position in Litter-Bearing Mammals

Chapter:
(p.203) 10 Effects of Intrauterine Position in Litter-Bearing Mammals
Source:
Maternal Effects in Mammals
Author(s):

John G. Vandenbergh

Publisher:
University of Chicago Press
DOI:10.7208/chicago/9780226501222.003.0010

This chapter examines the influence of intrauterine position on the behavior of litter-bearing mammals. It reviews evidence that hormones from the mother, from exogenous hormone mimics, and from adjacent fetuses in the uterus can have profound effects on the behavior and physiological development of offspring. This chapter suggests that the intrauterine position of fetuses can have significant developmental consequences because males produce relatively high concentrations of testosterone in the prenatal period that can be transferred either through fetal membranes or the maternal circulation to adjacent siblings. The chapter also discusses the neuroendocrine mechanisms underlying hormone transfer between fetuses.

Keywords:   intrauterine position, litter-bearing mammals, fetuses, testosterone, adjacent sibling, fetal membranes, maternal circulation, neuroendocrine mechanisms, hormone transfer

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