Just an estimate: Keep in mind that the estimated fetal weight (efw) on a third trimester ultrasound is just an estimate with a margin of error. Also, fetal weight gain is variable depending on many factors. In general, it is estimated that a fetus is gaining about 1/2 a pound per week at this stage of pregnancy. That would put your fetus at about 5 lbs 11 oz at 36 wks 3 days based on your previous efw.
Answered 3/17/2017
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