How to use the fetal weight formula to calculate fetal weight and predict premature infant weight is a matter of clinical practice. There are many methods for predicting fetal weight. The most commonly used method is ultrasound examination, which can calculate the fetal weight based on factors such as fetal ultrasound values, gestational age, and weight. For example, according to Young\’s formula, fetal weight (g) = 0.031 × BPD (