Fig. 3. A. No. 10 trocar illustrating first (1) and second (2) markings to guide placement of implants. B. After infiltrating with local anesthetic, advance the trocar and obturator under the skin to the second mark nearer the hub. (Speroff L, Darney P: Long-acting steroid methods. In Fisher M [ed]: A Clinical Guide for Contraception. Baltimore, Williams & Wilkins, 1992)