PAINE #PANCE Pearl – OBGYN



Question

 

What the anatomic landmarks for estimation of gestational age based on fundal height measurements?

 



Answer

 

Measuring fundal height is a skill PA students must acquire on their OBGYN rotation.  Using a rolled tape measure, the distance is measured (in cm) from the pubic symphasis to the highest part of the uterus.  Note that it may not be mid-line and you will need to do some palpation to find the apex.

Image result for fundal height measurement

 

Anatomic landmarks can help estimate gestational age based on fundal height measurements:

  • 12 weeks – just above the pubic symphasis
  • 16 weeks – halfway between pubic symphasis and umbilicus
  • 20 weeks – at the level of the umbilicus

Image result for fundal height measurement

 

 

After 20 weeks, gestational age is estimated at 1 cm per week…..that is to say 25 weeks gestational should have a fundal height measurement of 25 cm (+/- 2 cm).


References

  1. Mackenzie AP, Stephenson CD, Funai EF. Prenatal assessment of gestational age, date of delivery, and fetal weight. UpToDate. 2017. Accessed February 10, 2018.

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