Hormonal Methods: 4: A progestin-filled "rod" no bigger than a "size of a pencil lead," etonogestrel implant (Nexplanon) can be embedded just under the skin on the inside of the upper arm where it will slowly release progestin over a period of 3 years. -inserted as an in-office procedure with the use of a local anesthetic during menses or no later than 'day 7 of a menstrual cycle. -can be used during breastfeeding without an effect on milk production. -Side Effects: Weight gain, irregular menstrual cycle (heavy bleeding, spotting, breakthrough bleeding, and amenorrhea), depression, scarring at the insertion site, and need for removal. -contraindications: pregnancy, desire to be pregnant within 1 year, and undiagnosed uterine bleeding. -Complication: infection at the insertion site, although this is very rare.