It is defined as the anomalous implantation of the fertilized ovule at the level of the ovarian parenchyma, which occurs in 0.5-3% of cases of ectopic pregnancy. This pathology is observed each more frequently, given its association with a history of PID, endometriosis, use of IUDs or other assisted reproduction techniques; It also has a mortality of up to 10%. Its clinical picture is usually variable and similar to other locations of ectopic pregnancy, which is why imaging studies play a fundamental role for its accurate diagnosis. Although multiple diagnostic criteria have been proposed, there is still little experience in this regard and very often it is usually confused with a tubal location pregnancy in previous imaging studies and confirmed its ovarian location at the time of surgery. We present the case of a 30-year-old woman, with a primitive diagnosis of ectopic pregnancy, and her sonographic follow-up is described until the precise diagnosis of right ectopic ovarian pregnancy, proposing the use of the sign of "block mobility" to sonographic compression as a guideline fundamental.