Pregnancy presents a similar situation, and fetal microchimerism among parous women is not uncommon. This also includes, supposedly, brain tissue: https://www.s

Pregnancy presents a similar situation, and fetal microchimerism among parous women is not uncommon. This also includes, supposedly, brain tissue: https://www.science.org/content/article/bearing-sons-can-alter-your-mind https://www.science.org/content/article/bearing-sons-can-alt...