Every expectant mother wonders if her child is growing at what is considered a normal rate. When your baby is measured at birth, the doctor may consult a growth chart that shows overall averages of fetal growth. However, all babies grow at different rates, and depending on your genetics and other factors, your baby may be bigger or smaller than average, though still normal for you.
Average Newborn Weight
The average birth weight of newborns is 8.12 lbs., according Babycenter.com's average fetal length and weight chart. However, KidsHealth, an informational website on the health, behavior and development of babies, children and teenagers, notes that newborns typically weigh between 6 lbs., 2 oz. and 9 lbs., 2 oz. If your newborn weighs more or less than this range, he may be healthy, but could be monitored by doctors depending on his size.
Average Newborn Height
KidsHealth states that newborn babies generally measure between 19 and 21 inches. When your baby is born, she will immediately be measured and you will be given her height measurement. If you are concerned about your newborn's length, consult her pediatrician.
Genetics and Gender
There are a number of factors that go into determining your baby's birth size. First, you are likely to have a baby that is proportionate to the size of you and your spouse. For example, if you are both tall, it is likely that you will have a longer, possibly larger baby. If you are both petite, it is likely that your newborn will be petite as well. Also, gender can play a part in baby's birth size, but typically the difference in size is minor.
Other Factors
If you are birthing multiples, it is likely that the babies will be on the smaller side. Likewise, if the mother encounters health issues during pregnancy, such as high blood pressure or heart problems, the baby's weight may be affected. Other factors, such as smoking or other drug use by the mother and poor nutrition can affect the size of the baby. Lastly, if the baby has any individual health issues, these may affect his birth size.
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