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Late motherhood boosts family lifespan
Date:5/3/2009

nd to live longer.

Compared with women who had their last baby before age 41, Utah pioneer women who had their last baby at age 41 to 44 were 6 percent less likely to die during any given year past age 50, and Utah pioneer women who had their final birth at age 45 or older were 14 percent less likely to die during any given year after age 50.

In other words, imagine woman A had her last baby at age 35, woman B had her last baby at 42 and woman C had her last baby at 46. Then at age 52 or any other age past 50 woman B would be 6 percent less likely to die than woman A, and woman C would be 14 percent less likely to die than woman A.

In Quebec, slightly different age groups were analyzed. Compared with younger mothers, women who had their last child between ages 42 and 44 were 6 percent less likely to die during any given year past age 50, and women who had their last child at age 44 or older were 17 percent less likely to die during any given year past age 50.

  • By looking at the brothers of women who had children late, the study suggests the same age-slowing genes may be responsible for both prolonged fertility in women and longer lifespan in both sexes. The effects of late fertility were strongest for brothers with at least three sisters because the larger the number of sisters, the more likely it is at least one will give birth in middle age.

So in the Utah group, brothers with three or more sisters at least one of whom gave birth at age 45 or older were 20 percent less likely to die during any given year after age 50 than men without late-fertile sisters.

In Quebec, brothers with three or more sisters at least one of whom gave birth at age 44 or older were almost 23 percent less likely to die during any single year after age 50 than men without sisters who gave birth late.

  • It is possible social and environmental reasons good water, good nutrition, a healthy environ
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Contact: Lee Siegel
leesiegel@ucomm.utah.edu
801-581-8993
University of Utah
Source:Eurekalert  

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