The baby at 30 weeks of pregnancy is about 2-3.4 pounds, and there are some differences between different babies. According to the pediatrics on the characteristics of embryonic and fetal development, the fetal development characteristics are as follows: at the end of 4 weekends, the placenta can be identified; at the end of 8 weekends, the first human form, the organs have been formed; at the end of 12 weekends, the genitals can be initially identified, the fetal limbs can be movable; at the end of 28 weekends, the fetus weighs about 1,000 grams, the eyes are half-open, and the limbs are movable well; at the end of 32 weekends, the fetus weighs about 1,700 grams. The baby at 30 weeks of pregnancy is probably between 1000 grams and 1700 grams, or between 2-3.4 pounds. However, due to genetic and nutritional differences, there are some individual differences in fetal weight. If it is significantly lower than normal or overweight, it is necessary to consider whether there is any abnormality in fetal development, which can be assessed comprehensively with other tests.