Background: An abnormal attachment of placental villous tissue to the uterine wall is known as placenta accreta spectrum. Based on the depth of the villous tissue adhering to the uterine wall, the placenta accreta spectrum is separated into three categories: accreta, increta, and percreta. The number of cesarean deliveries rises in tandem with the occurrence of spectrum placenta accreta. Method: This is a systematic review research where researchers will review relevant articles using predetermined criteria. Using the keyword of risk factors for placenta accreta spectrum from 2012 to 2022, we searched on PubMed. Obtain the seven most pertinent articles from Iran, Japan, Indonesia, the United Kingdom, Egypt, Australia, and New Zealand. Result and discussion: Of the seven articles that we have reviewed, it shows that the most common risk factors for placenta accreta spectrum are age, parity, history of caesarean section, history of curettage, placenta previa and body mass index. Conclusion: Based on the results obtained, six risk factors were found to be most associated with the incidence of placenta accreta spectrum. These risk factors are age, parity, history of curettage, history of cesarean section, placenta previa, body mass index, and smoking.