Colour and Pulse Doppler can also helso to differentiate a non-specific adnexal mass. The colour flow pattern associated with an ectopic is variable, with a sensitivity of 73-69% and a specificity of 87-100%. The colour flow pattern appears as randomly dispersed multiple small vessels showing high velocity and low impedance flow signals (resistitive index (RI) of 0.38-0.45), the classical ring of fire sign. However, womaen with tubal abortion demonstrate significantly higher impedance (RI of up to 0.60) and less prominent colour flow in the trophoblastic tissue. Therefore, this sign is more likely to be seen in a corpus luteum cyst as this is more common than an ectopic pregnancy. Colour Dopppler imging is most helpful when an ectopic pregnancy is not seen but is highly suspected. In such cases, colour Doppler imaging can be used to help find a mass surrounded by bowel loops. In our case, colour Doppler and M mode ultrasound further helped to confirm and document cardiac activity and peritrophoblastic flow.