Doppler ultrasonography is the same as ...

Good afternoon! Does this make me doubt ... I wonder if an obstetrical ultrasound with Doppler is the same thing as normal obstetrical ultrasonography? Because the doctor passed a Doppler ultrasound for me to do, but I already did one in the month of March and the deadline to do another with Doppler by the health plan hapvida is 3 months and has not yet completed. Can I do a Doppler ultrasound? Is it the same thing?
Expert answer:

They are different tests with different indications (they are requested for different situations).