Fundal height is a measurement of the size of your uterus. The height in centimeters should correspond to how many weeks along you are in your pregnancy.
Your health-care provider will take this measurement at every prenatal visit. He will find the top of your uterus and measure down, using a tape measure, to the top of the public bone. This measurement reassures you and your health-care provider that your baby is growing at the right rate. A smaller-than-normal measurement can indicate growth or development problems.
Fundal height measurements begin to lose accuracy after about thirty-six weeks of pregnancy because the baby settles down into the mother's pelvis, below the lowermost point of measurement.