But I'll say this, your crowd at the LA Times probably aren't human.
This naturally acquired microchimerism (Mc) may impart beneficial or adverse effects on human health. Fetal Mc, which describes the persistence of cells and/or DNA of fetal origin in the mother acquired during pregnancy, has been associated with several different autoimmune diseases as well as implicated in tissue repair and immunosurveillance [4][6].Could progesterone be a key to the lock on the blood-brain barrier?
Nature linked that FReebie.
FReepmail me if you want on or off my combined microbiology/immunology ping list.