Estimation of the volume of liquor in second trimester.
D000653:Amniotic Fluid / Q000187:drug effects / Q000502:physiology*; D005260:Female; D006801:Humans; D011247:Pregnancy; D011262:Pregnancy Trimester, Second; D012462:Saline Solution, Hypertonic / Q000494:pharmacology
D012462:Saline Solution, Hypertonic