average fetal length and weight chart

7/27/2019 Average Fetal Length and Weight Chart

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AVERAGE FETAL LENGTH AND WEIGHT CHART

Average fetal length and weight chart

From early on in pregnancy, babies grow at different rates, so these numbers are merely averages. Your baby's length and

weight may differ greatly from these figures. Don't worry too much if an ultrasoundindicates that your baby is

muchsmallerorlarger. YourmidwifeorGPwill let you know if you should worry about what size your baby is.

By full-term, your baby may end up weighing fewer than five pounds or more than nine. For the purposes of this chart, babies

are measured from the crown (or top) of the head to the rump (or bottom) until about 20 weeks.

After 20 weeks, they're measured from crown to heel. This is because a baby's legs are curled up against his torso during the

first half of pregnancy and very hard to measure. If you have a question about dates, see our article onhow BabyCentre works

out how pregnant you are.

From eight to about 20 weeks, your baby will be measured from crown to rump as below:

Pregnancy week Length (inches) Weight (ounces) Length (cm) Mass (g)

8 weeks 0.63 inch 0.04 ounce 1.6 cm 1 gram

9 weeks 0.90 inch 0.07 ounce 2.3 cm 2 grams



12 weeks 2.13 inches 0.49 ounce 5.4 cm 14 grams



15 weeks 3.98 inches 2.47 ounces 10.1 cm 70 grams


17 weeks 5.12 inches 4.94 ounces 13 cm 140 grams



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Then from about 20 weeks, your baby will be measured from crown to heel:

Pregnancyweek

Length (inches) Weight (ounces) Length (cm) Mass (g)




23 weeks 11.38 inches 1.10 pound 28.9 cm 501 grams

24 weeks 11.81 inches 1.32 pound 30 cm 600 grams




28 weeks 14.80 inches 2.22 pounds 37.6 cm 1005 grams






34 weeks 17.72 inches 4.73 pounds 45 cm 2146 grams











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average fetal length and weight chart

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