Low amniotic fluid volume is poorly identified in singleton and twin pregnancies using the 2 x 2 cm pocket technique of the biophysical profile.
Magann EF, Nevils BG, Chauhan SP, Whitworth NS, Klausen JH, Morrison JC. Low amniotic fluid volume is poorly identified in singleton and twin pregnancies using the 2 x 2 cm pocket technique of the biophysical profile. South Med J. 1999 Aug; 92(8):802-5.