"have had nexplanon for 9 months. insertion left a bruise and the first week was difficult with headaches as my body sorted out the hormones. overall this has been an effective product. does the job as a contraceptive. only get a period every three months, but they are getting heavier each time which worries me. they last about a week. i have gained about ten pounds and depression and anxiety have gotten worse. you really need to weigh the pros and cons before choosing this method."