Pelvic abscess is a rare but serious complication following oocyte retrieval in assisted reproductive technology.Its nonspecific clinical presentation often leads to misdiagnosis or delayed diagnosis,which can result in treatment delays and increased complexity.The risk of developing a pelvic abscess is significantly higher in patients combined endometriosis.This report presents a case of a female patient with adenomyosis and ovarian endometriotic cysts who developed a pelvic abscess after oocyte retrieval.While her symptoms initially improved with antibiotic therapy and abscess drainage,the condition later recurred,necessitating laparoscopic surgery combined with antibiotic resistance against infection for a definitive cure.This case underscores the importance of early diagnosis and intervention in managing pelvic abscesses post-oocyte retrieval.For recurrent cases,more aggressive interventions should be taken to optimise the patient's prognosis and reduce the risk of complications.