characteristics and symptoms in each and every case. It is more accurately described as a "sequence" or chain of events that may have different beginnings (absent kidneys, cystic kidneys, obstructed ureters or other causes), but which all end with the same conclusion (absent or reduced volume of amniotic fluid). This is why Potter syndrome is often called Potter sequence or oligohydramnios sequence by some clinicians and researchers. The term Potter syndrome is most frequently associated with the condition of oligohydramnios sequence regardless of the root cause of the absence or reduced volume of amniotic fluid. However, as noted in this article, the term Potter syndrome was initially coined in order to refer to fetuses and infants with BRA. It was not until later that the term became more encompassing as it was noted that other causes of failed fetal urine production also resulted in similar physical characteristics and prognoses of the fetuses and infants with BRA (that which Potter originally described in 1946). Since then, the term Potter syndrome has become a misnomer and experts have attempted not to eliminate the terminology, but to modify it in a way so as to be able to determine the different root causes by creating a nomenclature system. However, this classification system has not caught on in the clinical and research fields. See also Kidney development References External links Nephrology Congenital disorders of urinary system Syndromes de:Oligohydramnion#Oligohydramnion-Sequenz