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Review articles, conference papers, and case reports were excluded.<\/jats:p><\/jats:sec><jats:sec><jats:title>Data collection<\/jats:title><jats:p>A standardized sheet was used to abstract data from eligible studies. CON\u2010PAS registry was used to include studies on other conservative modalities.<\/jats:p><\/jats:sec><jats:sec><jats:title>Results<\/jats:title><jats:p>Four studies were eligible (399 patients). Average residual placental volume was 61.74\u00a0cm<jats:sup>3<\/jats:sup> (6.01\u2013339\u00a0cm<jats:sup>3<\/jats:sup>). Treatment was successful in all patients. Normal menstruation recovered after 48.8\u00a0days (15\u2013150\u00a0days). No major complications were encountered. Sixty\u2010one studies were retrieved from the CON\u2010PAS registry; uterine artery embolization (23 studies), balloon placement (15 studies), compression sutures (10 studies), placenta in situ (7 studies), and uterine resection (6 studies) were successful in 83.7%, 92.9%, 87.9%, 85.2%, and 79.3% of cases, respectively.<\/jats:p><\/jats:sec><jats:sec><jats:title>Conclusions<\/jats:title><jats:p>HIFU may fit certain clinical situations in the management of PAS. 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