Interestingly, some of these proteins naturally pass from the bloodstream of a pregnant woman to the separate blood system of her fetus. ​ — 6 / 1, pages 30, 31.
On huvitav, et mõningad neist proteiinidest lähevad loomulikul teel raseda naise vereringest tema lootes eraldi toimivasse vereringesse. — 1.6., leheküljed 30, 31.