This will happen every day for 16 years, but can be stopped at any time by using a wireless remote control.
The project has been backed by Bill Gates, and will be submitted for pre-clinical testing in the US next year - and possibly go on sale by 2018.
The next challenge for the team is to ensure the absolute security of the device to prevent activation or deactivation by another person without the woman's knowledge.
"Communication with the implant has to occur at skin contact level distance," said Dr Farra.
"Someone across the room cannot re-programme your implant.
"Then we have secure encryption. That prevents someone from trying to interpret or intervene between the communications."
Hackers are going to be on this like white on rice.
Corporations and Ministries of Defense around the world, with ironclad security, still get hacked.
And they say this is designed for use in the Third World.
Isn't there a bit of a disconnect? Large populations have inadequate food and lack clean water, but we're worried about ... contraception.
Well, Suzanne, it's obvious, it makes fewer mouths to feed.
And, what about...actually feeding them?