Nausea and vomiting of pregnancy: An evolutionary hypothesis

Nausea and vomiting of pregnancy, "morning sickness", is a common contemporary complaint. Many pregnant patients note alterations in smell and taste which can precipitate "morning sickness", symptoms that characterize early gestation. Epidemiologic studies suggest that pregnancie...

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Autor principal:	Lee,Richard V
Lenguaje:	English
Publicado:	Sociedad Médica de Santiago 2002
Materias:	Chemoreceptors Nausea Pregnancy toxemias Smell Vomiting
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0034-98872002000500014
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spelling	oai:scielo:S0034-988720020005000142002-08-22Nausea and vomiting of pregnancy: An evolutionary hypothesisLee,Richard V Chemoreceptors Nausea Pregnancy toxemias Smell Vomiting Nausea and vomiting of pregnancy, "morning sickness", is a common contemporary complaint. Many pregnant patients note alterations in smell and taste which can precipitate "morning sickness", symptoms that characterize early gestation. Epidemiologic studies suggest that pregnancies accompanied by "morning sickness" have better outcomes than asymptomatic pregnancies. The intimate connection between immunogenetic identity, chemoidentity, and chemocommunication by olfactory mechanisms suggests a relationship between maternal symptoms and maternal accommodation of paternal antigens contained in the fetoplacental unit. Most mammalian species utilize olfaction to reduce inbreeding and thus do not require an intimate placental connection between mother and fetus. The evolution of Homo sapiens included prolonged periods of small, genetically homogeneous foraging groups which limited selection of genetically heterogeneous mates. Adaptation to this circumstance included a reduction of olfactory precision in mate selection and a more intimate association between mother and fetus, the hemochorial placenta (Rev Med Chile 2002; 130: 580-84)info:eu-repo/semantics/openAccessSociedad Médica de SantiagoRevista médica de Chile v.130 n.5 20022002-05-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0034-98872002000500014en10.4067/S0034-98872002000500014
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	Chemoreceptors Nausea Pregnancy toxemias Smell Vomiting
spellingShingle	Chemoreceptors Nausea Pregnancy toxemias Smell Vomiting Lee,Richard V Nausea and vomiting of pregnancy: An evolutionary hypothesis
description	Nausea and vomiting of pregnancy, "morning sickness", is a common contemporary complaint. Many pregnant patients note alterations in smell and taste which can precipitate "morning sickness", symptoms that characterize early gestation. Epidemiologic studies suggest that pregnancies accompanied by "morning sickness" have better outcomes than asymptomatic pregnancies. The intimate connection between immunogenetic identity, chemoidentity, and chemocommunication by olfactory mechanisms suggests a relationship between maternal symptoms and maternal accommodation of paternal antigens contained in the fetoplacental unit. Most mammalian species utilize olfaction to reduce inbreeding and thus do not require an intimate placental connection between mother and fetus. The evolution of Homo sapiens included prolonged periods of small, genetically homogeneous foraging groups which limited selection of genetically heterogeneous mates. Adaptation to this circumstance included a reduction of olfactory precision in mate selection and a more intimate association between mother and fetus, the hemochorial placenta (Rev Med Chile 2002; 130: 580-84)
author	Lee,Richard V
author_facet	Lee,Richard V
author_sort	Lee,Richard V
title	Nausea and vomiting of pregnancy: An evolutionary hypothesis
title_short	Nausea and vomiting of pregnancy: An evolutionary hypothesis
title_full	Nausea and vomiting of pregnancy: An evolutionary hypothesis
title_fullStr	Nausea and vomiting of pregnancy: An evolutionary hypothesis
title_full_unstemmed	Nausea and vomiting of pregnancy: An evolutionary hypothesis
title_sort	nausea and vomiting of pregnancy: an evolutionary hypothesis
publisher	Sociedad Médica de Santiago
publishDate	2002
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0034-98872002000500014
work_keys_str_mv	AT leerichardv nauseaandvomitingofpregnancyanevolutionaryhypothesis
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Nausea and vomiting of pregnancy: An evolutionary hypothesis

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