Ectopic pregnancy can be detected by a blood test. 95% of ectopic pregnancies are tubal pregnancies, which means that there is no gestational sac in the uterine cavity, but rather it lays in the fallopian tube. The blood test for ectopic pregnancy is mainly a blood test for HCG. The placenta will start to secrete HCG on the seventh day after the formation of the fertilized egg, which means that an increase in HC can be detected in the mother’s blood on the eighth day after the formation of the fertilized egg, which proves that pregnancy has occurred. In order to confirm ectopic pregnancy, ultrasound examination is needed to see the gestational sac, yolk sac or primordial ventricular pulsation outside the uterine cavity, which means that the fertilized egg is laid outside the uterine cavity.