This program graphically displays the 5th and 95th percentiles for Doppler measurements of the umbilical artery, middle cerebral artery, uterine artery, ductus venosus, umbilical vein, and inferior vena cava. The user simply enters the gestational age and the corresponding Doppler measurements. All measurements include references from the medical literature. This program is useful in various clinical settings such as labor and delivery, obstetrical clinics, etc.