A new injectable contraceptive platform developed with Gates Foundation funding is being promoted as a "nonsurgical option for women," but its self-assembling drug delivery mechanism and potential for future adaptation to neuropsychiatric and infectious disease drugs raise serious safety, ethical, and biosecurity concerns.

Bill Gates supports depopulation, during a 2010 TedTalk stating that "if we do a really great job on new vaccines, health care, reproductive health services, we could lower [the world population] by, perhaps, 10 or 15 percent."