Grow the life-span that the son may shorten mother

Grow the life-span that the son may shorten mother
To mother, it is an arduous thing to give birth to the son. First of all, at the time of production, the general boy baby will be a little heavier than the baby girl; Secondly, give birth to son, mother the intersection of testosterone and content can rise in the body; Certainly, the boy is more naughty and more noisy than girl after growing up, make mothers troublesome endlessly too. The intersection of Weir and the intersection of skin and agate Lu of university, Sheffield of British, verify after consulting a record of Finland over the last 200 years: The life-span that the son will shorten mother that grow, the average length is 34 weeks.


Weir of Finnish evolutionary biologist with the help of pedigree expert the intersection of skin and agate Lu, the materials folder before consulting centuries and epitome film decades ago, attempt to find out that evolves on the influence of multiplying to the mankind. Historian, economist, even the sociologists all once carried on research in their own fields by this kind of method, but Ma Lu to come, carry on biologist of research as one animal modern mankind in the first batch, only the quantity of this kind of animal of ours has materials and can be consulted.

The s result of study reveals, bears the son's mother, the life-span is shorter than to bear the daughter's mother to Sami, this is involved in the baby's weight and testosterone level. Lu Ma says, testosterone will jeopardize the immune system, influences the health. Born the son's mothers to popular infectious disease ' Such as pulmonary tuberculosis) Particularly sensitive; " cost which gives birth to the son " Older than to give birth to the daughter, because the boy will draw more nutrients from the parent, this and to other mammals (such as red deer) Study too identical. Certainly, the boy will not very help mother like daughter either when growing up.


Give birth to the son Mother Life-span
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