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Can grandparents influence the ferti...

Christensen, Edward R.

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Can grandparents influence the fertility of their daughters?

紀錄類型:	書目-語言資料,印刷品 : Monograph/item
正題名/作者:	Can grandparents influence the fertility of their daughters?/
作者:	Christensen, Edward R.
面頁冊數:	40 p.
附註:	Source: Dissertation Abstracts International, Volume: 70-04, Section: A, page: 1334.
Contained By:	Dissertation Abstracts International70-04A.
標題:	Anthropology, Physical. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3353526
ISBN:	9781109100341

Can grandparents influence the fertility of their daughters?
Christensen, Edward R.

Can grandparents influence the fertility of their daughters? - 40 p.

Source: Dissertation Abstracts International, Volume: 70-04, Section: A, page: 1334.

Thesis (Ph.D.)--The University of Utah, 2009.

In the last half century, many scientists have proposed explanations for the uniquely long postreproductive life spans of female Homo sapiens . One early hypothesis suggested that menopause may have arisen because aging mothers might increase their inclusive fitness by ceasing reproduction in favor of providing assistance to their already-born daughters, thus increasing their daughters' fertility and leaving more descendants surviving to reproductive maturity.

ISBN: 9781109100341Subjects--Topical Terms:

877524
Anthropology, Physical.

Can grandparents influence the fertility of their daughters?
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245 1 0 $a Can grandparents influence the fertility of their daughters?
300 $a 40 p.
500 $a Source: Dissertation Abstracts International, Volume: 70-04, Section: A, page: 1334.
502 $a Thesis (Ph.D.)--The University of Utah, 2009.
520 $a In the last half century, many scientists have proposed explanations for the uniquely long postreproductive life spans of female Homo sapiens . One early hypothesis suggested that menopause may have arisen because aging mothers might increase their inclusive fitness by ceasing reproduction in favor of providing assistance to their already-born daughters, thus increasing their daughters' fertility and leaving more descendants surviving to reproductive maturity.
520 $a The few empirical tests of such "grandmother hypotheses" have involved relatively small sample sizes and produced divergent conclusions. With access to the Utah Population Database, a large number of three-generation pedigrees of 23,048 mothers (Egos) born between 1860 and 1899 and who bore all of their 173,354 children in Utah were examined.
520 $a Egos with living parents, especially mothers, had shorter interbirth intervals than those whose parents were deceased (ceterus paribus ). In the Cox proportional fertility hazards models, Egos had significantly higher fertility hazard rate ratios. The offspring of Egos with living mothers showed better survival rates, although this effect was modest.
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650 4 $a Sociology, Demography. $3 1020257
650 4 $a Sociology, Individual and Family Studies. $3 626655
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