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We also thank the editor and two anonymous referees for their constructive feedback and help in improving the manuscript. You can also search for this author in PubMed Google Scholar. C wrote the main manuscript and prepared all figures. All authors were involved in interpretation of results and reviewing the manuscript. Correspondence to Simon N. Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material.
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Reprints and Permissions. Offspring fertility and grandchild survival enhanced by maternal grandmothers in a pre-industrial human society. Sci Rep 11, Download citation. Received : 08 June Accepted : 02 February Published : 11 February Anyone you share the following link with will be able to read this content:. Sorry, a shareable link is not currently available for this article.
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Advanced search. Skip to main content Thank you for visiting nature. Download PDF. Subjects Evolutionary theory Social evolution. Abstract Help is directed towards kin in many cooperative species, but its nature and intensity can vary by context. Introduction One common explanation for helping behaviour is kin selection, whereby an individual gains fitness benefits by helping relatives 1.
Methods Study population We investigated how mother fertility and grandchild survival were affected by grandmother presence using an extensive pre-industrial demographic dataset collected from population registers see e.
Statistical analysis All analysis was conducted with R 3. Grandchild survival outcomes In the survival analyses, the response variable was whether the focal grandchild survived in a given year binary: alive 1, dead 0.
Results We preface the results with the caveats that all analyses are correlative and that no direct measures of investment e. Lineage-specific grand mother effects on offspring fertility Age at first reproduction Descriptive statistics of the data show that the mean age at first reproduction was earliest when both the mother and mother-in-law were alive Figure 1.
Full size image. Figure 2. Libby British. Mia British. Karen Australian. Hayley Australian. Natasha Australian. Veena Indian. Priya Indian. Neerja Indian. Zira US English. Oliver British. Wendy British. Fred US English.
Tessa South African. How to say paternal grandmother in sign language? Numerology Chaldean Numerology The numerical value of paternal grandmother in Chaldean Numerology is: 8 Pythagorean Numerology The numerical value of paternal grandmother in Pythagorean Numerology is: 3. Leo Terrell : She has damaged her chances for future custodial rights, she disobeyed a court order to return the children. Select another language:. Please enter your email address: Subscribe.
Is it a myth that paternal grandmothers yield to maternal grandmothers? Do you adhere to it, or do you fight it? Has it proven true in your life as a maternal grandmother? Has it proven true for those of you who are paternal grandmothers? Now, certainly this is not the case for all paternal grandmothers. Some daughters-in-law are more laid back, open and accepting, while others are more tense when it comes to turning their baby over to the paternal grandmother.
And then there are exceptional paternal grandmothers. Take Mary Ann as an example. She has three sons.
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