How long does Perlutan have full protection against pregnancy?

I would like to know how long Perlutam has full protection against pregnancy, once the injection is taken. For the bull does not talk about. I need to have sex with a condom or not.
Expert answer:

It will only be "fully protected" after 30 days, ie the first injection will still have to use a condom and 1 month is the duration of the contraceptive effect (maybe a few more days, but only 1 month security) and should be applied every 30 days.