“FHI 360 is leading a Phase I clinical trial of the biodegradable contraceptive implant Casea S in the Dominican Republic. Casea S is designed to release a synthetic hormone (the progestin etonogestrel, which is used in existing contraceptive implants) to prevent pregnancy for 18 to 24 months before dissolving, eliminating the need for removal by a health care provider.”
From FHI 360.