In recent decades there has been a trend towards a steady increase in the incidence of ectopic pregnancy all over the world, which is associated with the rapid increase in inflammatory diseases of the internal genital organs. The paper describes 2 clinical cases of rare forms of ectopic pregnancy; these are interstitial and cervical ones. It is shown that the early diagnosis of these rare and unfavorable prognostic forms of ectopic pregnancy can prevent life-threatened complications and prevent organ-sparing surgery.