The contraceptive implant is a contraceptive about the size of a matchstick. A healthcare professional can insert it under the skin of the inside upper arm. In many countries there are lots of contraceptive implants available, including those which do not stop fertilisation. The common implant Nexplanon stops ovulation and makes it more difficult for the sperm cells to get through the cervical mucus. The implant is effective for three years, after that it has to be removed or changed. Using the implant can disturb the menstrual cycle. Some people lose their periods totally, while others get regular or irregular periods. An advantage when compared to the combined contraceptive pill is that you do not need to take a pill every day. The contraceptive implant is one of the most reliable contraceptives on the market.