In OBGYN ultrasound, the fetal pole is the earliest visible evidence of a developing embryo within the gestational sac, appearing as a thickened, hyperechoic structure. Its presence confirms an intrauterine pregnancy and is crucial for dating the pregnancy in early stages. Sonographers carefully measure the crown-rump length (CRL) of the fetal pole to estimate gestational age, ensuring accurate prenatal care.
This vital landmark in early pregnancy ultrasound helps distinguish between a viable pregnancy and conditions like an anembryonic gestation (blighted ovum). Observing the fetal pole and detecting cardiac activity are key indicators of a healthy, progressing pregnancy, offering reassurance to expectant parents and guiding subsequent prenatal management.
