How does a Nexplanon subdermal birth control implant ACTUALLY work?
I've had a nexplanon for a little over a year now and it's worked great for me as a birth control method. I know that it works by releasing a form of progesterone to prevent pregnancy, but it just dawned on me, HOW does the little stick know how much to release every day so that it lasts three years? Do some people use it up faster/slower than the three years? What happens if it does run out of progesterone while you have it in? I guess my brain just cant really think of how the implant doesn't just immediately give you an overload of hormones and then runs out days later, and Google doesn't really explain how that works either, just tells me things I already know like what it does.