# Microchimerism. Well, wow **URL:** \ **Category:** Miscellaneous and Personal Stuff I Must Share\ **Created:** [December 9, 2025, 2:42am UTC](https://boards.straightdope.com/t/microchimerism-well-wow/1025538 "2025-12-09T02:42:03Z")\ **Posts on this page:** 3\ **Page:** 1
**Author:** ![Cartooniverse](https://sea3.discourse-cdn.com/straightdope/user_avatar/boards.straightdope.com/cartooniverse/32/3084_2.png) [@Cartooniverse](https://boards.straightdope.com/u/Cartooniverse)\ **Post date:** [December 9, 2025, 2:42am UTC](https://boards.straightdope.com/t/microchimerism-well-wow/1025538/1 "2025-12-09T02:42:03Z")
The [flow of DNA back and forth](https://pmc.ncbi.nlm.nih.gov/articles/PMC11299782/) seems to be just incredible. The image charting the two-way path of DNA through generations shows it all. What might this mean for, well, brain health across generations, etc? ---
**Author:** ![Babale](https://sea3.discourse-cdn.com/straightdope/user_avatar/boards.straightdope.com/babale/32/15666_2.png) [@Babale](https://boards.straightdope.com/u/Babale)\ **Post date:** [December 9, 2025, 3:16am UTC](https://boards.straightdope.com/t/microchimerism-well-wow/1025538/2 "2025-12-09T03:16:48Z")
> [@Cartooniverse](#): > > What might this mean for, well, brain health across generations, etc? Why would it mean anything for brain health across generations? Glancing at the study, it looks like it impacts the immune system in infancy, which makes sense - what impact are you expecting on the brain specifically? ---
**Author:** ![Cartooniverse](https://sea3.discourse-cdn.com/straightdope/user_avatar/boards.straightdope.com/cartooniverse/32/3084_2.png) [@Cartooniverse](https://boards.straightdope.com/u/Cartooniverse)\ **Post date:** [December 15, 2025, 11:03pm UTC](https://boards.straightdope.com/t/microchimerism-well-wow/1025538/3 "2025-12-15T23:03:37Z")
I am no expert- just a fascinated civilian. The arrows flow both ways. Why would I think the adult WOULDN’T have DNA in their brains from their nursing offspring?