number of fetuses with cardiovascular malformations to total number of fetuses ratio
number of fetuses with hydrocephaly to total number of fetuses ratio
number of fetuses with left umbilical artery to total number of fetuses ratio
A calculated measurement in which the number of fetuses with left umbilical artery is divided by the total number of fetuses in the prospective litter, and the result presented as a ratio, fraction, quotient or percentage. In a rat fetus the right umbilical artery tends to remain patent while the left becomes closed near the end of gestation.
number of fetuses with renal malformations to total number of fetuses ratio