How do you calculate fundal height in weeks?

How do you calculate fundal height in 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.

How do you calculate gestational age from fundal height?


  1. a. The gestational age based on the fundal height measurement is seven months.
  2. b. If Abebech is really seven months pregnant, you would expect her abdomen to measure about 28 cm from her pubic bone to the top of the uterus, i.e. approximately one centimetre for each week of pregnancy dated from the LNMP.

What should fundal height be at 40 weeks?

Fundal height, when expressed in centimeters, roughly corresponds to gestational age in weeks between 16 and 36 weeks for a vertex fetus….Fundal height landmarks.

Gestational age Fundal height landmark
36–40 weeks Xiphoid process of sternum
37–40 weeks Regression of fundal height between 36–32 cm

What is the normal fundal height at 32 weeks?

Your fundal height in centimetres usually equals the number of weeks that you’re pregnant, give or take 2cm (0.78in) either way. So when you’re 32 weeks pregnant, your measurement should be somewhere between 30cm and 34cm (12in and 13in).

What should your fundal height be at 26 weeks?

So if your fundal distance is about 26 centimeters (plus or minus 2 centimeters), you are probably around week 26 of your pregnancy. Of course the fundal height can’t give an exact number of weeks or show the exact size of your baby, but it’s a good estimate.

What should fundal height be at 27 weeks?

The expectation is that after week 24 of pregnancy the fundal height for a normally growing baby will match the number of weeks of pregnancy — plus or minus 2 centimeters. For example, if you’re 27 weeks pregnant, your health care provider would expect your fundal height to be about 27 centimeters.

What should fundal height be at 26 weeks?

Can I measure my own fundal height?

Using a tape measure that measures centimeters, place the zero marker at the top of the uterus. Move the tape measure vertically down your stomach and place the other end at the top of your pubic bone. This is your fundal height measurement.

What should my fundal height be at 34 weeks?

At 34 weeks pregnant, your belly should measure about 32 to 36 centimeters from the top of the uterus to the pubic bone.

What should fundal height be at 28 weeks?

Your OB will probably measure your 28 weeks pregnant belly at your prenatal appointment. This week, fundal height—the distance from your pubic bone to the top of your uterus—should be about 26 to 30 centimeters.

When do they start measuring fundal height?

Starting at about 20 weeks, your healthcare provider will measure your fundal height – the distance from your pubic bone to the top of your uterus – at each of your prenatal visits. This measurement helps your provider estimate your baby’s size, growth rate, and position during the second half of your pregnancy.

How accurate are fundal height measurements?

However, a small random study in 1990 found that fundal height measurements were about 28% accurate and abdominal palpation about 48%. More recently, a larger random study found that fundal height measurement were about 46 to 48% accurate, with abdominal palpation about 24 to 29% accurate.

When do doctors begin measuring fundal height?

20 weeks gestation: In clinical practice, recording the actual fundal height measurement from the palpable top of the uterus to the superior edge of the pubic symphysis is standard practice beginning around 20 weeks gestation. Most caregivers will record their patient’s fundal height on every prenatal visit.

When is fundal height measured?

To measure your belly, your OB-GYN or midwife will perform a fundal height measurement each visit starting at about 12 weeks. This measures your baby’s growth and is the “distance from the pubic bone to the top of the uterus measured in centimeters.

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