Fertility after an implant? When the implant is removed fertility returns quickly with most women returning to their previous menstrual cycle within a month. If you do not wish to fall pregnant, you must consider alternate methods of contraception straight away. The implant is not effective after three years so it should be removed and the same or another contraceptive method used. A single procedure can be used to remove an old implant and put in a new one. The implant should be removed after 3 years even if you no longer require contraception. If a pregnancy occurs with an expired Implanon NXT® in place, then there is a small increased risk of the pregnancy implanting in the fallopian tube (ectopic pregnancy). This can be a serious condition.