Amniotic fluid and the clinical relevance of the sonographically estimated amniotic fluid volume: oligohydramnios.
Magann EF, Sandlin AT, Ounpraseuth ST. Amniotic fluid and the clinical relevance of the sonographically estimated amniotic fluid volume: oligohydramnios. J Ultrasound Med. 2011 Nov; 30(11):1573-85.