Fundal height

Fundal height is a common measurement used in obstetrics to estimate the growth and development of a fetus during pregnancy. It is measured from the top of the mother's uterus (the fundus) to the top of the mother's pubic bone. The measurement in centimeters often corresponds with the number of weeks of pregnancy after the 20th week.

Measurement

The measurement of fundal height is usually done during prenatal visits to the healthcare provider. The mother is asked to lie on her back on an examination table, and a tape measure is used to measure the distance from the pubic bone to the top of the uterus. The measurement is taken in centimeters and is usually the same as the number of weeks of pregnancy, give or take 2 centimeters. For example, at 24 weeks gestation, the fundal height should be approximately 24 centimeters.

Significance

Fundal height is an important indicator of fetal growth and development. A fundal height that is smaller or larger than expected could indicate a potential problem with the pregnancy. A smaller than expected fundal height could indicate intrauterine growth restriction (IUGR), which means the baby is not growing at the expected rate. A larger than expected fundal height could indicate macrosomia (a larger than average baby), polyhydramnios (excessive amniotic fluid), or a multiple pregnancy.

Limitations

While fundal height is a useful tool in monitoring fetal growth, it is not always accurate. Factors such as the mother's body mass index (BMI), the position of the baby, and the amount of amniotic fluid can affect the measurement. In addition, fundal height measurements can be less accurate later in pregnancy when the baby begins to descend into the pelvis in preparation for birth.

See also

• Obstetrics
• Pregnancy
• Fetus
• Intrauterine growth restriction
• Macrosomia
• Polyhydramnios