Is Fundal Height Always Accurate?
Checking your fundal height is just one way that your healthcare provider can check your pregnancy health and your baby's growth and development. It's not always accurate, but along with ultrasound scans and other tests, measuring the fundal height can help keep your pregnancy and baby healthy.
Can baby position affect fundal height?
This may make your bump appear smaller, even if your baby is the right size. The position your baby's lying in, and your own height, shape and tummy muscles can all affect the measurement too.
My baby is small for dates. Is something wrong? - BabyCentre UK
Can your fundal height be wrong?
Measuring bigger or smaller than the average is usually perfectly normal. In fact, research suggests fundal height measurements are often off by two weeks in non-obese women. There's always a margin of error when it comes to estimating the exact weight and size of an unborn baby.
Fundal Height and Measuring Your Baby's Size in Utero
Is fundal height accurate before 20 weeks?
As a rule of thumb, your fundal height in centimeters should roughly equal the number of weeks you're pregnant. For example, at 20 weeks, your fundal height should be about 17 to 23 centimeters.
Fundal height: Measuring large or small for gestational age
Is fundal height reliable?
But fundal height is only a tool for gauging fetal growth — it's not an exact science. And further research is needed to determine how effective it is in detecting intrauterine growth restriction. Typically, fundal height measurements offer reassurance of a baby's steady growth.
Fundal height: An accurate sign of fetal growth? - Mayo Clinic