This article presents two cases of ectopic pregnancy, of different locations (ovaries and rudimentary horn), which had a life-threatening course. Despite modern high-quality diagnostics, which are widely available in our time, we see that making a diagnosis caused difficulties, since the final diagnosis was established and confirmed only intraoperatively. Based on this, we concluded that the clinical picture can become the leading one in making a diagnosis and choosing a doctor’s logical tactics. Such rare localizations, which cause difficulties in making a diagnosis, should not be overlooked. If an ectopic pregnancy is not detected in a timely manner and the risks are underestimated, then death may occur. Two clinical cases clearly demonstrate timely diagnosis, regardless of additional examination methods (Ultrasound of the pelvic organs, human chorionic gonadotropin) and an adequate choice of access and scope of surgical intervention. We should also not forget about the lack of awareness among women about this type of pathology. Often patients do not complain, do not remember the date of their last menstruation or do not monitor their menstrual cycle at all, and do not seek medical help in a timely manner. The combination of several factors at the same time can lead to a fatal development of events.