The blood draw value refers to HCG, 53 doubled to 153 every other day, this value is still relatively low, generally can not accurately determine how likely the intrauterine pregnancy. If the ectopic pregnancy embryo activity is better, then there may also be HCG doubling phenomenon, so from the HCG value alone, can not judge whether it is intrauterine pregnancy. In general, to determine the intrauterine pregnancy, it is necessary to combine the HCG value of pregnant women, clinical symptoms, signs, ultrasound and other comprehensive judgment. If the HCG doubling is normal in early pregnancy and there is no abdominal pain or bleeding, it proves that the embryo is well developed; in the 40th day of pregnancy, you can check whether the gestational sac is located in the uterine cavity through ultrasound, so as to accurately determine whether it is an intrauterine pregnancy. Generally speaking, HCG doubling is normal, most of them are intrauterine pregnancy, pregnant women can do ultrasound in time to make a clear diagnosis, and ultrasound can also determine the condition of fetal heartbeat and fetal buds, if there is any abnormality, it is recommended to consult a doctor in time.