Percentage of maternal abdominal length for detecting accelerated uterine growth from a twin gestation.

Serial measurement of the uterine fundal height (FH) is the clinical parameter used most commonly in the assessment of fetal growth. A comparison of the FH value with its ratio to the symphysioxyphoid distance, or percentage of maternal abdominal length (PMAL), using two reference graphs, showed that the PMAL is a more sensitive parameter than FH alone in detecting accelerated uterine growth secondary to a twin gestation.