Where Does All the Foreign Male DNA in Women's Bodies Actually Come From? [Re-Issue]

TL;DR

Contrary to popular belief, women do not retain the DNA from every sexual partner they've had.

Transcript

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Key Insights

• 🕵️‍♀️ Women may have living male cells, known as micro chimerism, in their bodies.
• 🦠 The main source of micro chimerism is pregnancy, as fetal cells can survive long-term.
• 🧔‍♀️ The myth of women retaining DNA from sexual partners originated from a misinterpretation of a study.
• 🦠 Unprotected sexual partners are unlikely to contribute significantly to micro chimerism.

Questions & Answers

Q: Is it true that women retain the DNA of every man they've had sex with?

No, this is a myth. While women may have living male cells in their bodies, they primarily come from pregnancy, not sexual partners.

Q: How did the myth about women retaining DNA from sexual partners start?

The myth originated from a misinterpretation of a 2012 study that found male micro chimerism in women's brains. The study did not attribute the cells to sexual partners.

Q: Can male DNA from sexual partners survive in a woman's body?

While there is some brief cellular exchange during unprotected sex, it is unlikely for these cells to establish a cell line in the woman's body. The vagina is inhospitable to such cells, and the immune system would eliminate them.

Q: What are the potential benefits and drawbacks of micro chimerism?

Micro chimerism has been linked to potential benefits such as improved functioning renal systems in women with lupus erythematosus and a reduced risk of developing certain cancers. However, it may also increase the chances of autoimmune disorders and neurological disorders.

Summary & Key Takeaways

• Many women have living male cells in their bodies, including their brains, known as micro chimerism.

• A 2012 study showed that male micro chimerism can be present in women's brains, but it did not attribute the cells to former sexual partners.

• The main source of these cells is pregnancy, as fetal cell lines can survive in a woman's body for decades.