The Fetal Pole is seen during pregnancy as a thickening on the margin of the yolk sac. The fetal pole is not really a fetus but is the embryo during a very early stage of pregnancy. It looks very much like a small thickening on the side of the yolk sac contrary to most expectant mother's expectations. It gets its name from the fact that its puny size ensures no details can be seen on the ultrasound other than a tiny pole.
Normally it is seen in two and a half months with the help of ultra sound imaging and by using vaginal ultrasound imaging it can be identified within six weeks. Usually a fetal pole is observed at 2-4 mm CRL that is Crown Rump Length, and when it is seen, heart motion is most likely detected. If the embryo in case is less than 5mm CRL then although it is likely that the baby is healthy a follow up examination must necessarily show the heartbeat.
Normally it is seen in two and a half months with the help of ultra sound imaging and by using vaginal ultrasound imaging it can be identified within six weeks. Usually a fetal pole is observed at 2-4 mm CRL that is Crown Rump Length, and when it is seen, heart motion is most likely detected. If the embryo in case is less than 5mm CRL then although it is likely that the baby is healthy a follow up examination must necessarily show the heartbeat.