Ileocecocolic intussusception due to cecal endometriotic lesion is extremely rare, with symptoms that are often non‐specific, and delay in receiving support is resented by patients. We report the case of a 39‐year‐old woman who presented with major complications as a result of delayed diagnosis of cecal endometriosis. She experienced a diagnostic error that led to medical abortion for intractable vomiting, for which the pregnancy had been considered the only cause, resulting in secondary infertility. Six years later, she developed acute bowel intussusception after surgical treatment of rectal endometriosis requiring emergency surgery with ileocecal resection. After review of the literature, we draw attention to the major consequences of delay in diagnosis in the present case. Consequently, cecal location must not be missed in the diagnostic workup of gastrointestinal endometriosis.