A rare case of a heterotopic pregnancy after single embryo and blastocyst transfer is presented. A couple suffered from idiopathic infertility and underwent assisted reproduction techniques in a university hospital. Intercourse on the day of HCG administration was the probable cause for an in vivo fertilization of an oocyte that was not collected during the oocyte retrieval. The patient accessed a regional hospital with a massive haemoperitoneum in the 11th week of pregnancy with the confusing information that only one embryo had been transferred during the assisted reproduction treatment. After tubal pregnancy removal, the in-utero pregnancy proceeded normally but, at the time of the second trimester scan, a caudal regression syndrome was diagnosed and the patient decided to terminate the pregnancy.

Ovarian pregnancy is a rare condition. In article we report a case of ovarian pregnancy in a 42-years old woman who had already undergone an ipsylateral tubectomy because of an extrauterine pregnancy.Even though the patient showed no symptoms, the inadequate rise of β hCG and the ultrasound scan were suspicious for an ovarian pregnancy which was later confirmed, intrapoeratively as well as patohistologically.Some repeated values of β hCG did not show enough rise up and vaginal echography revealed atypical anechoic mass placed on or in the right ovary. The anechoic mass seen at right ovary become more and more tipical for gestational sac.In combination with the fact, that the uterine cavity was empty, without echo-signs of  intrauterine pregnancy and becouse of her past experiance of extrauterine pregnancy, we soon decided to perform a diagnostic laparoscopy, which confirmed our suspicion. Gestational sac was laparoscopicaly removed.The ovary and ovarian tube on her left side were normal and without any changes of chronical inflamatory disease.