If a female is not using any contraceptive
in past one month then implanon
is inserted between 1st and 5th day of your periods,as you have inserted it,then you can have sex it hour gettinging worried of being pregnant.
Similarly if the female is using birth control pills in the previous month,then implanon is inserted on next day of last active tablet taken.In such a case again one can have risk free sex.
However,if you deviate from this protocol,then an additional method of contraception
is required for at least one week after implanon insertion.