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That is irrelevant as it is consequence of life style change. Many mothers do not change lifestyle.

This however makes me think how much of the woman change is due to the life style change which is mandatory in given situation for majority of mothers and how much is programmed.

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> Many mothers do not change lifestyle.

I'm not sure what you mean. Babies necessitate a change of lifestyle if only because they demand to be fed in the middle of the night.

There are cultures where the grandparents or other relatives mostly take care of the children while the mother works (some parts of China), and there are people who pay for nannies to take care of the children at night.

Well sure, but there is certainly a massive change in lifestyle for 99% of mothers even if they continue working.

But if they are in part this study it doesn't matter.

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