The document discusses guidelines for who can and cannot use contraceptive implants. It states that implants are safe and appropriate for nearly all women, including adolescents, women living with HIV/AIDS, and women who have had abortions or miscarriages. However, some women should not use implants, such as those who are pregnant or breastfeeding within the first 6 weeks after giving birth, or who have certain medical conditions like blood clots, breast cancer, or serious liver disease. The document reviews the WHO medical eligibility criteria for contraceptive methods and provides guidance on when implants can be initiated for different groups of women.