Scans done after 40 weeks of gestation can be relied upon to give an accurate estimation of fetal weight, in fact more so than when the scan is done prior to 37 weeks. Learn what's going on with your little one at this part of your journey together. I had a scan at about 37 weeks which estimated him to weight almost 6 lbs. She was born at 40.1 wks at 8.5 lbs. The educational health content on What To Expect is reviewed by our medical review board and team of experts to be up-to-date and in line with the latest evidence-based medical information and accepted health guidelines, including the medically reviewed What to Expect books by Heidi Murkoff. ACOG advises "An accurate diagnosis of macrosomia can be made only by weighing the newborn after delivery." We strive to provide you with a high quality community experience. I've been on maternity leave for a week now and have not done much except eat, watch tv, and sleep. If your baby is long or has a big head it could make the estimations less accurate. Funny thing is that he was born at 11 lbs. My 6 lb baby spent over a week in NICU with breathing problems. My midwife sent me for an ultra sound today during my apt today because she was "concerned" about the weight (measuring 41 weeks at 37+4 weeks) & position of the baby (breech). My husband and I both have pretty big heads. Find advice, support and good company (and some stuff just for fun). How to Measure Fundal Height and Fetus Size. Did your doctor say if you are going to delivery vaginally or by c-section? I had an ultrasound at 34 weeks that estimated my baby to be 6 & 1/2 lb at that moment. He was a scrawny little guy, but healthy. The estimation of fetal weight during pregnancy is among the most important examinations done. and 24". I am so thankful she came early and the doctor didn't have a chance to make me go through with the c section. With my previous pregnancy they estimated she was about 4lbs at 37 weeks, then they redid the ultrasound a day (or 2 my memory is foggy) and the next tech said 6lbs. Third trimester weeks, the ultimate checklist. Fetal ultrasound, while helpful, tends to underestimate large babies and overestimate small ones, according to a 2006 study reported in “The New Zealand Medical Journal.” Considerations. We were all expecting a 10 lb baby on my due date, but not any bigger than that. So my DD was closer. So 3.25 kg rather than 3.8, slight discrepancy! Are you sure you want to delete your comment? She came out screaming and weighing 7lb 8oz. His head measured 5 lbs 6 oz. One study out of Israel showed ultrasounds that were done in the early third trimester (28-34 weeks) didn’t give an accurate estimate of the baby’s weight. Born 37 week 1 day at 4 lbs 8 oz. —Guest Briana, Off by a pound My twins were supposed to be 'within an ounce of one another' just a bit before I went into labor. —maelli3, Waaaay off. We keep them up because there are a ton of great conversations here and we believe you deserve to see them all. If you feel a message or content violates these standards and would like to request its removal please submit the following information and our moderating team will respond shortly. She is concerned because the baby is measuring 7 pounds. Nope - he only weighed 7 lb 2 oz. estimated 95th percentile at28wks. :). She was born vaginally with no complications and I was not induced. —hostdiane, It happens! One thing that is show in some studies is that an estimation of a big baby or a fat baby via ultrasound can increase the likelihood that you will have a cesarean. With my second I had my last ultrasound at 28 weeks, they guessed he was about 5 lbs at that time. —Guest tonya.meza, "your lucky if she weighs 7 pounds" Hinting that she was small, the Doc said that at the required-to-stay-eligble-ultrasound the day before Bobbie was born, and weighed in at 10 pounds 13 ounces. If it seems like baby is taking up all the room, they will be big. His head is on the larger size, so that may have contributed to the over-estimation. U/S can be off by much depend on how experience the tech that takes it, some are good and some are not as good as others, I heard that it could be off by 2 lbs. Hello,Yesterday I had an ultrasound at 39.2 weeks and baby weight is estimated to be 8 lbs 3 ounces and is in 95 percentile. Create an account or log in to participate. Learn more about, How Big Is My Baby? With this one they have been telling me 50th percentile the whole time and he was born 39 weeks at exactly 50th percentile. 9 weeks' gestation allow for more accurate prediction of birth weight than sonograms later in gestation. A 37-week ultrasound might be performed as part of a biophysical profile. Ultrasound for fetal weight estimation is notoriously inaccurate for predicting the weight of … Often a woman does this because her care provider has told her the baby is already 8 pounds, at 36 weeks, and she might need a c-section. So we induced. Estimated fetal weight ultrasound accuracy.. How accurate was the estimated weight vs how much your baby actually weighed at birth? Born at 38+1 and only weighed 6lbs. On my next post, I will be talking about 37 weeks pregnancy and ultrasound. Well the baby's not breech like she thought he may be and estimated weight is about 7 lbs 8 oz (I am 37 weeks 4 days) so the weight is on the 'higher' side. As a doula I see the inaccuracies all the time. Ultrasound exams are notoriously inaccurate for predicting the weight of your baby. 36 weeks 4 days estimated to be 5 lbs 1 oz at regular dr appointment - on 37 weeks estimated to be 4 lbs 13 oz at high risk u/s. Ultrasound is estimated to predict within 8-15% of true birth weight. —Guest onlycathyo, Ouch! —Guest Jennifer, Bigger Baby I only had one u/s at 20 weeks and then manual assessment. The ultrasound gives an estimate of the weight of your baby, but this estimate can be off a pound or more in either direction. ... My last ultrasound was at 37 weeks they said she was 8.2 pounds. Estimated to be over 8.5 pounds... my baby was delivered 6lbs 6oz. Well the baby's not breech like she thought he may be and estimated weight is about 7 lbs 8 oz (I am 37 weeks 4 days) so the weight is on the 'higher' side. I feel moist babies are around 6-8 lbs ! Though these differences are small and not clinically significant, this study indicates that serial sonograms in … Induction was never mentioned even though I birthed at 41.6 weeks (also very normal in our family) and there was never a mention of a possible section. —Guest Dana, More than 1 lb off! I never measured ahead with any of my other babies and they weren't nearly as large, but I measured 4 weeks ahead with this baby starting at 34 weeks and at 36 weeks I was just as big as my 3 others were at 40 weeks, so that tipped us off that he would be big, and my dr even said he'd be big so him being big wasn't a surprise but how large he was, def was! Are you sure you want to delete your discussion? The views expressed in community are solely the opinions of participants, and do not reflect those of What to Expect. I was wondering for all those of you that have had your baby’s and also had scans later in pregnancy, how accurate was your baby’s scan weight to your baby’s actual... Ultrasounds: Baby Weight Prediction Accurate? Create an account or log in to participate. they said my due date was off. but wound up being 7 lbs 13 oz. My midwife sent me for an ultra sound today during my apt today because she was "concerned" about the weight (measuring 41 weeks at 37+4 weeks) & position of the baby (breech). He came at 39 weeks only weighing 7 lbs. She was born 2 days shy of her due date at 6lbs 9oz. Learn more about. Here you have the most useful information about your 36 week Pregnancy. They convinced me I needed a c-section. This educational content is not medical or diagnostic advice. Ultrasound for fetal weight estimation is notoriously inaccurate for predicting the weight of babies. At birth, they were a full pound different. Ultrasound was way off! I delivered at 38 weeks 4 days and she was 7lbs 14 oz. The Pediatritian assessed him and said he looked to be 36 1/2 weeks. "For a 9-pound baby, an ultrasound’s predictive accuracy … —Shelby.M09, Way way off. My best advice to you is to feel your stomach. We strive to provide you with a high quality community experience. We respect everyone’s right to express their thoughts and opinions as long as they remain respectful of other community members, and meet What to Expect’s Terms of Use. Please whitelist our site to get all the best deals and offers from our partners. Pregnant Katy Perry Says She Hopes Her Baby Is a Girl — Is There Any Way to Predict Baby’s Gender? I had an ultrasound at 36 weeks and baby was measuring 8lbs 11oz so the dr was talking about inducing me at 39 weeks so she wouldn't be too big for a vaginal delivery. —Guest LeahT. So it's not an exact science! At 38 weeks the average crown to heel length is 49.8cm (19.6in) and the average weight is 3.1kg (6.8lb. The views expressed in community are solely the opinions of participants, and do not reflect those of What to Expect. There are multiple ways to predict the weight via ultrasound, making it not advised for most to make decisions about induction and planned cesarean section based solely on estimated fetal weight. Mine was very accurate, I got weight at 36 weeks … My Dr is concerned the baby is measuring big and I may end up needing a C-section. I hope this information helps you somehow. To mamas who have given birth .... at 36 weeks 2 days they estimated my guy at 6 pounds 12 ounces . —Guest mamazzz, Estimate Was Incorrect My baby's final ultrasound was two days before she was born, during a biophysical profile. Not unusual for in my family but maybe good that doctors didn't use the big baby scare to push early interventions. At 37 weeks pregnant, the doctor can tell you the baby weight which will more or less be final. I gave birth to a healthy 3.9kg baby 3 days before due date - very, very accurate for me. I know the US is not the most accurate … With it diet controlled baby was apparently following 75th percentile - baby was born on 6th & up over 90th. Tuesday morning (after 36 hours of labor) I had to have an emergency c-section and the baby was 9lbs 5oz. Around week 20, an ultrasound might be used to detect fetal abnormalities. Use of this site is subject to our terms of use and privacy policy. There is no method of checking fetal size before delivery can provide more than an estimated fetal weight (EFW). Unfortunitly some DRs do not let their clients know that and moms make decisions based on faulty info. I turned around and had a vaginal birth with my next baby who was over 8 lbs - so the weight wasn't an issue, it was my doctor's concern about the weight that made me have a c-section. Between weeks 37 and 40, your baby starts to descend into your pelvis in preparation for birth, so the measurement of fundal height begins to decrease. This is also not accurate, though some practitioners are better than others. This educational content is not medical or diagnostic advice. A term pregnancy is defined as the period of gestation from 37 completed weeks up to ... p = 0.001) were all lower in the non-accurate compared to the accurate weight estimation group. My husband is making me give away the chocolate cake I bought yesterday. When the doc felt my tummy he said he would of guessed 6 lbs but ultrasound said diff. —Guest mommajean, swore no way a 10 pounder! After my son I never put much stock in ultrasounds. However, u/s aren't completely accurate either. But unlike weighing the baby on a scale after birth, even the best ultrasound measurements aren't 100% reliable. Pregnancy And Baby Care Articles Pregnancy Week By Week. So rarely do OB's notify their patients that 3rd trimester ultrasounds have an acceptable variance of + / - two weeks! I had a 9lb 10oz baby boy the following week. We respect everyone’s right to express their thoughts and opinions as long as they remain respectful of other community members, and meet What to Expect’s Terms of Use. so pretty accurate for me For moms who are 37 weeks pregnant with twins, your doctor might talk to you about induction or c-section (depending on your medical history and babies’ statuses). Thanks for comforting me. My last ultrasound was taken the night before (done at 9:30 p.m. surgery at 10 a.m.) the c-section (full placenta previa, and started going into labor.) They were way off. Many women will have lots of stories about being induced for having suspected large babies, there are even stories about scheduled cesareans. I had a boy just 2 weeks ago and when i was 35 weeks they told me he was 6 pounds and would weigh about 8 pounds at birth. During this last weeks of pregnancy his/her weight gain is just .5 ounce/day compared to 1 ounce/ day in earlier weeks. Week 37 Ultrasound: What It Would Look Like Now that you're 37 weeks pregnant, your baby is full term! At 37 weeks we were told our son would be born at over 9 lbs. Lucky you, I had my 37th week u/s today and docs said that she's already 8lb and 12 oz. I've gained 26 pounds and this is my first pregnancy. If your pregnancy has a gestational age of less than 8 weeks (between 6 and 8 weeks), a transvaginal ultrasound (inserting the ultrasound probe into your vagina) is usually needed for accurate results. Good luck! Related posts you might like to read after. If you feel a message or content violates these standards and would like to request its removal please submit the following information and our moderating team will respond shortly. Don't let it stress you out, it can be WAYY off! —tanyago, Varied with my 2 kids With my son, I had an ultrasound at around 38 wks, and they said he weighed 8.5l bs. 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