Monitoring the development of a baby's weight since he was in the womb is important. By knowing the development of the baby's weight, pregnant women can get an idea whether your child will be born with a normal weight, excessive, or even less. Normally, Asian babies are born between 2.9 and 3.6 kilograms (kg). If explained in more detail, the average weight of a baby boy born at 37-41 weeks' gestation is between 3 - 3.6 kg, while the weight of a baby girl ranges from 2.9 kg to 3.4 kg. If the Baby's Weight is Below the Normal Limit In general, babies are considered to be under normal weight if born with a weight of less than 2.5 kg. This baby's underweight can be caused by a variety of factors, including: Health problems in pregnant women Health problems in pregnant women such as hypertension, diabetes, or heart problems can affect the baby's weight. For example, if pregnant women experience hypertension, the baby can be born with a body weight below ...