During pregnancy, many expectant mothers are very concerned about their own weight and the weight of their fetus. In fact, fetal weight can be calculated through many methods, among which efw is an indicator for calculating weight. So what is the calculation method? The next thing the editor wants to talk about is how EFW calculates fetal weight.
People usually measure the weight of a newborn baby after birth, but the measurement is not done directly with a ruler, but through formulas.
When estimating the weight of a fetus, the data obtained cannot represent the actual weight of the newborn baby. The real purpose of predicting their weight is also to detect whether the baby has any developmental problems earlier. Generally speaking, there is an error of approximately ± 10-15% between the actual weight at birth and the predicted weight. For example, a newborn baby weighing only 4000 grams may have a measurement error range of around 400 grams. That is to say, the larger the baby's weight, the wider the range of errors will be. Here are some commonly used formulas for calculating fetal weight in obstetrics, for your reference:
Formula 1: Estimated weight of fetal treasure (g)=-4973+260 × HC (here refers to circumference)
Formula 2: Estimated weight of fetal treasure (g)=-2686+171 × AC (referring to abdominal circumference)
Formula 3: Estimated weight of fetal treasure (g)=-2232+747 × FL (here referring to femur length)
Pregnant mothers may want to start recording their weight measurements at any time in a table starting from the 12th week of pregnancy, or simply create a curve chart of the measured data to observe the changes in their weight throughout the entire pregnancy more realistically and vividly, thus gaining a more comprehensive understanding of the fetal development.
