Amniotic banded echoes are not necessarily amniotic syndrome. The formation of banded echoes within the amniotic fluid can be due to a variety of reasons, including normal physiologic phenomena, pathologic phenomena such as intertwinning septum, amniotic sheets, incomplete longitudinal uterine septum, incomplete fusion of amniotic chorionic villi, chorionic placenta, and amniotic banding syndrome, thereby affecting the prognosis of the fetus. Normal physiologic phenomena may be amniotic banding due to the umbilical cord. Pathologic phenomena, such as separation of the amniotic membrane from the chorionic villus or rupture of the amniotic membrane for certain reasons, or causing folds of the amniotic membrane and chorionic villus to extend into the amniotic cavity, can result in the formation of bands of strong echoes in the amniotic fluid. These include intertwinning septa, amniotic sheets, incomplete longitudinal uterus, unfused amniotic chorionic villi, chorionic placenta, and amniotic band syndrome. Examination for amniotic band syndrome includes physical examination of the pregnant woman, ultrasound, which reveals irregular bands of echoes at the site of the fetal abnormality or elsewhere, with points of attachment in the amniotic plate or fetal body, and magnetic resonance imaging (MRI) for detailed examination if the ultrasound is suspicious or a fetal abnormality is detected.