Some moms might pass more than genetics to their newborns. Doctors found three babies born to women with hip implants had high levels of chromium and cobalt in their umbilical cord blood - metals that had worn off the implants.
The results show an association between levels of
cobalt and chromium - components of metal implants - in mothers and their babies at the time of delivery.
The finding was only for women with so-called "metal-on-metal" hip implants, in which both the ball of the joint and the surface of the socket are made of metal. The charged form of the cobalt and chromium, called ions, get released as a result of wear and corrosion as the metal parts rub against one another.
The researchers stress that they aren't sure if these metals have detrimental effects for either the mother or her offspring. And the study involved only a few participants, so more research is needed to confirm the findings.