Seeing a ring blood flow signal around the CDFI in early pregnancy is usually normal and a good sign. Early pregnancy CDFI peripheral see ring blood flow signal, may be a normal intrauterine pregnancy, the fertilized egg after the bed to have a normal blood supply, the embryo can develop normally. CDFI indicates visible blood flow signal, is a description of the ultrasound results, suggesting that the location observed by ultrasound is richer in blood flow, implying that there exists a more active local tissue growth at that location, CHFI is a blood flow response only when the fetus has a heartbeat, which is a normal phenomenon. When a woman after menopause in the fallopian tubes, ovaries on the detection of blood flow signals, and there is a mass, consider the possibility of ectopic pregnancy is relatively large, to be combined with blood tests HCG and progesterone to determine. Early pregnancy to do a good pregnancy maternity test, there are abnormalities can be targeted treatment.