I’m surprised that such a thing is possible, and I see a number of other applications for the technology. no comment on the ethics of it.
The chip functions by regulating hormone production. Hormone production can be turned on and off via remote control so that women who have it implanted can turn it off to be able to get pregnant.
Bill & Melinda Gates are supporting this with a multi-million-dollar grant. The story also notes that testing is being done to ensure the chip cannot be hacked.