article_snippet.sent: The report added: 'As we age, it is more difficult for we tissue to regenerate our tissue. '
article_snippet.sent: Previous research has also found that old mice given a transfusion of younger mice's blood performed better in a memory task than those that aged naturally.
article_snippet.sent: A study by Stanford University found that changes in the make-up of people's blood as people age may damage connections in the brain and so cause memory deterioration and the decline of other brain functions.
article_snippet.sent: This could be tackled by filtering more youthful blood into the older body, which would rejuvenate old tissue and keep nerve cells in better working order, according to research that suggests that pregnancy can restore the mother's muscles' ability to regenerate.