Whether the contraceptive injection is harmful to the body, need to be combined with the frequency of use, there are no side effects and other comprehensive judgment, short-term use is generally not very harmful to the body. Contraceptive injections work in a similar way to birth control pills, preventing pregnancy by inhibiting ovulation, altering the function of the uterine lining, changing the nature of the cervical mucus, and affecting the function of the fallopian tubes. An occasional contraceptive injection usually does not have much of an effect on health and mainly serves as a contraceptive. Contraceptive injections have side effects, such as endocrine disorders, menstrual cycle disorders, thrombophilia, etc. The risk of long-term use increases and long-term use is generally not recommended. Before using contraceptive injection should consult a professional doctor, according to their own situation to decide whether it can be used, do not blindly buy on their own. During the use of contraceptive injections, you should go to the hospital regularly to check your blood lipids, liver function, and ultrasound of the uterine adnexes and breasts, and consult a doctor for examination in time if you feel uncomfortable.