The contraceptive implant Implanon is a small plastic tube containing contraceptive medication that is inserted under the skin of a woman's non-dominant arm. The implant contains the hormones levonorgestrel or etonogestrel.

Taking birth control pills is an effective method of contraception and is also used to treat some diseases. The ingredients of birth control pills are hormones and affect the menstrual cycle. In some cases, women who take birth control pills may have lighter periods or some may stop having periods completely. There may be other reasons why your period is late after taking birth control pills.