Can Baby Position Affect Fundal Height?
It could be that there isn't much fluid around your baby. 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.
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 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.
Fundal Height: What It Means During Pregnancy - Healthline
What can cause increased fundal height?
A larger than expected fundal height could be a sign of fetal macrosomia. Excessive amniotic fluid (polyhydramnios). Having too much amniotic fluid — the fluid that surrounds and protects a baby during pregnancy — might be a sign that your baby is larger than average.
Fetal macrosomia - Symptoms and causes - Mayo Clinic
Why would fundal height decrease?
If your fundal height is smaller than expected, it may be because: Your baby is smaller than expected. You don't have enough amniotic fluid. Your baby's growth is being restricted.
What to Know About Measuring Fundal Height - WebMD