It might sound like science fiction, but it's completely real. Microchimerism is a fascinating phenomenon that occurs when a person carries cells from another genetically different person in their body. Yes, you read that right: you can have another person's cells inside you without knowing it . And what's most surprising is that this phenomenon occurs more frequently in women who have been pregnant.

During pregnancy, there is an exchange of cells between the mother and the fetus. These cells can cross the placenta and settle in organs such as the heart, lungs, brain, or even the skin. In many cases, the baby's cells remain in the mother's body for years… or even a lifetime .

This phenomenon can also occur in reverse: maternal cells can remain in the baby's body. Cases of microchimerism have even been detected between siblings who shared the womb, or through blood transfusions and transplants.

The most striking thing is that these cells not only “live” inside the host body, but can also influence its health . Some research suggests that microchimerism could be linked to both benefits (such as increased immune resistance) and risks (such as autoimmune diseases). But the field is still developing, and the mystery remains unsolved.

On an emotional level, there's something poetic about this. The thought that a mother can carry her child's cells with her, even years after birth, connects us to a profound level of physical and spiritual bond. A kind of biological imprint of eternal love .

Microchimerism is changing our understanding of identity, body, and motherhood. It reminds us that we are not just a "self," but a shared history, lived from within .