Low birth weight is most often caused by being born too early (premature birth). That means before 37 weeks of pregnancy. A premature baby has less time in the mother's womb (uterus) to grow and gain weight. Much of a baby's weight is gained during the last weeks of pregnancy.

While some babies born at a low birth weight are healthy, others may need treatment. Here’s how low birth weight is defined and what it means for your baby's development. What is considered low birth weight? What causes low birth weight in a baby? What are the risk factors for a low birth weight baby? How does low birth weight affect infants?

2019年8月30日 · My baby girl was born a week ago, 37 weeks and was 4 lb 15 oz. No NICU time, we are home and she is now 4 lb 9 oz. We go on for weekly weight checks and she’s eating really well...just little.

2011年7月15日 · Babies are 7 lb 8 on average last i heard. 4 is very premie size and I don't believe they let you leave the hospital below 5. My friend was 4.5 weeks early this week and her ds was 5 lb 11. 4 seems very small for a full term. Maybe it was a typo?

There are two main causes of low birth weight: premature birth and fetal growth restriction. Premature birth, or preterm birth, means your baby was born before 37 weeks of pregnancy. If your baby was born early, it means they spent less time growing and gaining weight in …

2007年12月15日 · They put on roughly half a pound a week in late pregnancy, so 4lb 4oz at 35 weeks suggests a baby heading for just under 7lb a full-term, which is a perfectly respectable size (although, like you, I had a 10lb 5.5oz baby so anything under 8lb always sounds tiny to me).

2023年1月29日 · About seven in 100 babies born in the UK have a low birth weight. If your baby weighs less than 1.5kg, midwives, doctors and nurses describe them as having a very, or extremely, low birth weight. This can happen to babies who are born prematurely.

Premature birth happens in the U.S. in about 11 to 13 percent of pregnancies — and almost 60 percent of twins, triplets and other multiples arrive early too. The average newborn weight of a full-term baby is about 7.5 pounds, depending on race and ethnicity.

2012年5月30日 · I went for an ultrasound right at 31 weeks and they said baby is around 4 pounds already.. Do you think it will be around 9 pounds by 40 weeks?

2011年3月20日 · I had an ultrasound this week, and the doc. said that my baby is estimated at 4lbs. I'm only 29 weeks along! I feel like the lady in the exercise video at 36 weeks looks the same as me!!