In practice the most common equations for calculating the estimated fetal weight (EFW) are reported to be the Shepard and Hadlock formulas [5,8,9]: Shepard: Log 10 (weight) = -1.7492+ 0.166*BPD +0.046*AC - 2.646*(AC*BPD)/1,00 Estimated Fetal Weight (EFW): If you already have entered the individual head circumference, abdominal circumference and femur length, press the button of EFW to calculate the estimated fetal weight, the corresponding percentile and its graphical representation

- This Fetal Weight Calculator calculates the size and weight of your unborn baby and helps you to keep track of your baby's growth in the womb. Estimate Fetal Weight Calculator BPD in m
- al circumference and diameter of your baby's head). Enter the measurements in the highlighted box above and then get the weight of your baby
- Our fetal percentile calculator faciliates the process of computing the fetus weight, based on the ultrasound measurements; however, if you'd like to calculate it yourself, you're more than welcome to try the equation we used: log 10 (Fetal weight) = 1.3596 - (0.00386 * AC * FL) + (0.0064 * HC) + (0.00061 * BPD * AC) + (0.0424 * AC) + (0.174 * FL)
- al circumference (AC)
- Birth weight (g) median. 5 th, 10 th, 90 th and 95 th centiles. 22 24 26 28 30 32 34 36 38 40 42 0 500 1000 1500 2000 2500 3000 3500 4000 4500 Gestational age (w) The birth weight is plotted on the reference range for gestational age derived from the formula reported by: Nicolaides KH, Wright D, Syngelaki A, Wright A, Akolekar R. Fetal Medicine.

Gestational age (weeks): Gestational age (days): Longitudinal diameter A (mm): Transversal diameter B (mm): Head circumference (mm): Calculate. LHR: o/e LHR (%): Prediction of survival click to expand contents. Prediction of survival in right CDH. Lung to head ratio o/e (%): Calculate. Expected survival %: Anemia The Estimated Fetal Weight Calculator is an Excel-based application. It produces centiles and z-scores for these measurements based on the INTERGROWTH-21 st Estimated Fetal Weight Standards. Excel-based EFW Calculator. N/A. Centiles and z-scores of large datasets can also be calculated. Symphysis-Fundal Height observed in your sample. For determining the mean birthweight use at least 100 deliveries at 40 weeks. In order to obtain local percentiles, enter in the yellow field below the mean birthweight at 40 weeks. Optionally, enter the standard deviation of your sample's mean birthweight in the light green field below

** Fetal Growth Calculator Percentile Range Gestational Age (weeks) Race Measure 3rd Percentile 5th Percentile 10th Percentile 50th Percentile 90th Percentile 95th Percentile 97th Percentile 10**.00 Non-Hispanic Whit The online fetal development calculator tells you the estimated fetal weight once you provide fetal biparietal diameter and fetal abdominal circumference. Know more about the health of your fetus by checking it's weight regularly to ensure safe delivery of your child Weight . 18.2 to 21.4 pounds. 19.8 to 22.9 pounds. 15 Months : Girls . Boys. Height . 29.9 to 31.2 inches. 30.5 to 31.8 inches. Weight . 19.5 to 23.0 pounds. 21.1 to 24.5 pounds. 18 Months : Girls. Boys. Height. 31.0 to 32.5 inches. 31.7 to 33.1 inches. Weight. 20.8 to 24.5 pounds. 22.4 to 26.0 pounds. 21 Months : Girls. Boys. Height. 32.1 to 33.8 inches. 32.7 to 34.3 inches. Weight. 22.0 to 26.0 pound Fetal Biometry Calculator II. Enter stated gestational age weeks days. Enter your measured value (mm, grams, or ratio) Head. Chest. Measurement. Measurement. Measurement. Measurement Calculated optimal birth weight at term = gm 10th to 90th centile gm. Enter specific gestation to obtain estimated optimal fetal weight at that gestation. GESTATION Weeks = + days = is gm 10th to 90th centile gm. Expected fundal height cms 10th to 90th centiles. References Gardosi J, Mongelli M, Chang A

Calculator for customised birth weight at term and optimal fetal weight according to gestation. NOTE: No formula for estimating the fetal 'Birth Weight' has achieved an accuracy which enables us to recommend its use. It should be noted that errors of about 10% are reported and that even at this level of accuracy it is disappointing * The estimated fetal weight from the measurements of HC, AC and FL is derived from the formula reported by: Hadlock FP, Harrist RB, Martinez-Poyer J*. In utero analysis of fetal growth: a sonographic weight standard. Radiology 1991; 181: 129-133 . The estimated fetal weight is plotted on the reference range for gestational age derived from the. The Fetal Development Calculator can calculate the size and weight of your unborn baby and help you to keep track of your baby's growth in the womb. According to the number of weeks you have been pregnant, the Fetal Development Calculator determines the growth of your baby

Estimated fetal weight (eFW in Kg, BPD and AC in mm): Log 10 (eFW)= -1.7492+(0.0166*BPD)+(0.0046*AC)-2.646*(BPD*AC)/100 This pregnancy weight gain calculator provides a recommended weight gain schedule on a week-by-week basis based on pre-pregnancy bodyweight, through guidelines provided by the Institute of Medicine. Track recommended weight gain, or explore hundreds of other free calculators addressing fitness, health, finance, math, and more This app uses WHO tables and data for calculations. This calculator provides your baby's weight percentile based on age. The percentile shows how your infant's weight compares to other infants. The percentile tells you what percentage of babies weigh less than your baby. For example out of a sample of 100 babies, a percentile value of 40. By looking at the scatter plot of the regression model we have derived a simple clinical formula which is easily remembered as: Estimated fetal weight (gm) = 2600 + 115(symphysis fundal height (cm) - 30). Conclusion: Johnson's formula was found to be inaccurate in this study among the studied population Weight gain: Weight gain is a largely inevitable and necessary aspect of pregnancy that varies between people. It affects many aspects of fetal development such as the weight of the baby, the placenta, extra circulatory fluid, and its fat and protein stores

- Simple fetal weight calculator Chicken pox in pregnancy: - decision assistance Customised ideal fetal weight calculators (According to Gardosi J, Mongelli M, Chang A.) Risk of malignancy index calculator for ovarian tumours Critical Appraisal Page (with off-line calcalator package) for single treatment trial.
- Gestational Estimated
**fetal****weight**percentile age This program is based on**fetal****weight**equation proposed by Hadlock et al. [Hadlock FP, Harrist RB, Martinez-Poyer J. In utero analysis of**fetal**growth: a sonographic**weight**standard. /Radiology/ 1991;181(1):129-33.] and adapts th - The NICHD Fetal Growth Studies velocity calculator is designed to estimate fetal growth velocity between 11 0/7 to 41 6/7 weeks of gestation for one baby. Four estimates of estimated fetal weight (EFW) percentiles can be obtained and depend on the ultrasound measurements entered, including head circumference (HC), biparietal diameter (BPD.
- al circumference (A) and femur length (F) obtained from ultrasound measurements to calculate the estimated fetal weight (in grams). Please enter only one of the following combinations: A, AF, AFH, AFB or.
- The calculator then calculates the percentile for each factor, as well as the estimated foetal weight at the time of delivery. Suppose the foetus is in the 60th percentile for weight, at 30 weeks . This means that 60% of foetuses weigh the same or less than the baby at 30 weeks
- Fetal weight calculator. Categories Calculators Tags eng, tool fetal growth, tools. Calculator. Gestational age (GA) Height, cm. Weight, g. Calculate. IVF beta hCG levels calculator: scatter chart and doubling time. Progesterone level calculator. Sperm analysis calculator. Pregnancy-associated plasma protein A (PAPP-A) Ovulation calculator for.
- The Fetal Weight Calculator helps physicians, nurses, midwives, medical residents, students and other medical professionals quickly compute prenatal weight estimates by using one or more key measurements from a fetal sonogram (ultrasound)

Our fetal weight percentile calculator computes your child's growth and compares it to the general population. Our BPD, HC, AC, and FL calculator uses all the necessary ultrasound fetal measurements to compute your child's weight at a given week of the pregnancy. We use the Hadlock equation and WHO multinational growth charts Fetal growth percentile software: a tool to calculate estimated fetal weight percentiles for 6 standards June 2, 2020 Over the years, several fetal growth standards were proposed, based on either fetal or neonatal data, and they include 1) one-size-fits-all; 2) customized by race/ethnic group and other maternal and fetal characteristics; and 3.

The Fetal Weight Calculator helps physicians, nurses, midwives, medical residents, students and other medical professionals quickly compute prenatal weight estimates by using one or more key. ** The Fetal Weight Calculator helps physicians, nurses, midwives, medical residents, students and other medical professionals quickly compute prenatal weight estimates by using one or more key measurements from a fetal sonogram (ultrasound)**. Weight estimates can provide helpful guidance during a mother's pregnancy and can also be used to help. Customised fetal weight calculator according to Gardosi et al. 0 like. Reply. See last answer. Bad signature. Les04fov. 09/06/2010 at 12:41 pm. Just tried mine and snap, my little man is estimated to be 7lb 8oz. Lesley x. 0 like. Reply. Search for a thread. Hay44doh. 09/06/2010 at 12:45 pm Estimating Fetal Weight. The software uses fetal biometric measurements of abdominal circumference, femur length and head circumference obtained from ultrasound to calculate the estimated fetal weight. The calculator is based on Campbell's (A) formula [1] and Hadlock's (H, A and F) formula [2], where: A = Abdominal circumference; F = Femur.

We developed a tool which provides the unique ability to calculate radiation doses received by the fetus from CT examinations using only a few input parameters. The algorithm employed by the tool is based on Monte Carlo simulations performed on computational phantoms and real data of pregnant patients at different gestational stages. This tool. The Fetal Growth Chart below shows the exact measurements of the average fetal length and weight by gestational age. Also, you can download this fetal growth chart as an image. If you don't know the length of your baby, but you know the length of his/her femur, you can find out that information using The Fetal Length Calculator * Gestational Estimated fetal weight percentile age This program is based on fetal weight equation proposed by Hadlock et al*. [Hadlock FP, Harrist RB, Martinez-Poyer J. In utero analysis of fetal growth: a sonographic weight standard. /Radiology/ 1991;181(1):129-33.] and adapts th

- Med. Calc: Pregnancy Due-Dates Calculator Last menstrual period : Conception Occurred : (about two weeks after last menstrual period) First Trimester Ends (12 weeks) : Second Trimester Ends (27 weeks) : Estimated Due Date (40 weeks) : On , you will be weeks pregnant. Created: Saturday, January 15, 2000.
- While weight gain during pregnancy is normal and necessary, studies have shown that certain ranges of weight gain given a specific body mass index (BMI) result in more positive outcomes for both fetus and mother. 1. Generally, it is recommended that pregnant women gain only 1-4 pounds during the first 3 months of pregnancy, and 1 pound per week.
- Excel-based calculator for estimated fetal weight: Excel-based Estimated Fetal Weight Calculator. Training & Resources. Study Protocol . Ultrasound operations manual. Fetal Growth Longitudinal Study Operation Manual. INTERGROWTH-21 st course on maternal, fetal and newborn growth monitoring - Module 3: Monitoring of fetal growth by ultrasound.
- al circumference and head circumference. rdrr.io Find an R package R language docs Run R in your browser. nutriverse/intergrowth An R Implementation of the INTERGROWTH-21st Standards and Tools. Package index. Search the nutriverse/intergrowth package.

Baby weight in pregnancy / Fetal weight can be as much as 2.5 KG in 7th Month. Refer the baby weight chart (in Grams). Doing & eating right things during pregnancy (specially 5th, 6th, 7th and 8th m Baby Growth Calculator. This simple calculator allows you to see how the weight and height (length) of an infant compare to other infants of the same age. It uses percentiles for the task of comparison. A percentile indicates the value at or below which a certain proportion of a population falls Fetal growth chart: 20 to 40 weeks of pregnancy. The lengths below are from head to foot (crown to heel). Pregnancy week. Average Length (cm) Average Weight (g) 20 weeks. 25.6cm. 300g. 21 weeks The calculation of fetal weight estimation tool uses a variable resistor (potentiometer) as a sensor to measure the fundal height. Then it will be processed in microcontroller. The measurement results are fundal height and estimation fetal weight that will be displayed on the TFT LCD

Weight calculation with our new formula was also tested against established equations 1, 5-8. Patients gave their verbal consent to this part of the study. In our department fetal weight determination is routinely applied in the diagnostic work-up of a small fetus. Ethical approval was therefore not sought 3. By fetal weight calculation using Johnson's clinical formula 4. By measuring outcome (weight of fetus 2.4. Fundal height measurement Firstly, patient need to empty their bladder also by means of non - elastic, a ﬂexible, standard sewing measuring tape in centimetres symphysio fundal height has been measured ** Select a Growth Chart: Newborn Length, Weight, and Head Circumference**. Pre-Term (Premie) Length, Weight, and Head Circumference. Down Syndrome Length and Weight, Birth to 36 months. Down Syndrome Length and Weight, 2 to 18 years. Weight-for-Age, birth to 36 months. Combined Length & Weight-for-Age Ultrasound estimation of fetal weight is a highly influential factor in antenatal management, guiding both the timing and mode of delivery of a pregnancy. Although substantial research has investigated the most accurate ultrasound formula for calculating estimated fetal weight, current evidence indi

AOGS MAIN RESEARCH ARTICLE Fetal death and placental weight/birthweight ratio: a population study CAMILLA HAAVALDSEN1, SVEN O. SAMUELSEN2,3 & ANNE ESKILD1,4 1Department of Gynecology and Obstetrics, Akershus University Hospital and Institute of Clinical Medicine, University of Oslo, Lørenskog, 2Department of Mathematics, University of Oslo, 3Division of Epidemiology, Norwegian Institute o How can you predict a Baby's Gender? The Baby Gender Calculator is based on the ancient Chinese Pregnancy Calendar which is said to be able to predict whether you will have a boy or a girl based on the mother's age and month of conception. Find out your baby's gender with the Baby Gender Predictor now!. To use the Baby Gender Predictor, you simply enter the two required values into the.

** - Weight - Size or Height - AFP (Abdominal Fetal Perimeter) or circumference of your baby's abdomen About you**, mom: - Number of pregnancy weeks - Possible Birth Date of your baby - Estimated weight gain, very useful to determine whether you are exceeded in weight - Uterine Height, or how much your uterus has grown in pregnanc For fetal sex, use 1 for a boy, -1 for a girl, or 0 if sex is unknown. For the baby's birth weight, take the number from your calculation and divide by 453 to get your baby's estimated weight. #babyfetalweightchartsDelivery Due date calculation Easy method. Weight of the baby during pregnancy/Fetal Weight Charts.Pregnancy Baby Positionhttps://youtu..

Our growth percentile calculator reveals how your child's size compares with other boys or girls the same age. Just enter your child's weight, height (aka length), and head circumference, and we'll calculate a percentile for each. That's a number reflecting what percentage of kids is larger or smaller Ultrasound estimation of fetal weight before birth is today very widely used in clinical practice, and, while essential for the identification and management of high-risk pregnancies, the current reference ranges used worldwide are largely based on single populations from a few high-income countries and are therefore of uncertain general. The other advantages of fetal biometry are the early diagnosis of malformations (e.g., the measurement of long bones in skeletal dysplasias) 4 and detection of patients at risk for aneuploidy (fetal nuchal translucency). 5. Calculations based on fetal measurements are also used to determine growth and weight Fenton 2013 Growth **Calculator** for Preterm Infants. Uses the 2013 Fenton growth charts to report percentiles and Z-scores. Now with integrated gestational age **calculator** and decision support (e.g., retinopathy of prematurity, RSV prophylaxis). Citing: If you use PediTools for a publication or clinical guideline, please consider citing: Chou JH.

Objective: To improve sonographic birth-weight prediction by developing fetal gender-specific formulae. Methods: This was a retrospective cross-sectional study. Two gender-specific formulae were produced from the data of 527 patients and the data of a further 349 patients were used to evaluate the formulae ** Estimated Fetal Weight Growth Percentile Calculator Babymed Com Women S Health And Education Center Whec Diagnostic Ultrasound App Annie Baby Growth Chart Calculator 6 Free Excel Pdf Doents Uncommon Baby Birth Weight Percentile Calculator Infant India Fetal Growth Chart Paras**. Download Birth Weight for Gestational Age (PDF document - 120 KB - 4 pages) Classification of growth for a particular gestational age is a critical part of fetal and infant care. References used at different centers are not always comparable, some are many years old and few have used rounding off to the nearest completed week of gestation as. In dw1227/FetalGPSR: Centile calculator based on estimated fetal weight growth charts. Description Usage Arguments Value References Examples. Description. This package provides functionality to calculate the customized percentile of Estimated Fetal Weight (EFW) based on six growth standards. Usag

This may result in underestimation of the AC and affect the accuracy of the fetal weight calculation. Because the estimated fetal weight (EFW) is critical for management decisions, including timing of delivery, it is important to determine the combination of biometric measurements that most accurately estimate the fetal weight in these fetuses Gestational age vs fetal age. Fetal age is separate from gestational age. While the gestational age measures how far a pregnancy has progressed in weeks, fetal age is the growing baby's actual age. Fetal age is counted from the moment of conception. Thus, it is 14 days less than the gestational age, assuming a regular menstrual cycle of 28 days Average fetal length and weight chart. istock.com / yacobchuk. During pregnancy, you'll see your bump get bigger as your baby develops inside your womb (uterus). By 40 weeks, the average baby weighs 3.5kg (7.6lb), and is about 51.2cm (20.2in) long from head to heel. (Hill 2019 2561 grams / 5lbs, 10oz. 3089 grams / 6lbs, 12oz. 37. 2230 grams / 4lbs, 14oz. 2697 grams / 5lbs, 15oz. 3261 grams / 7lbs, 3oz. Tags: estimated fetal weight for twins fetal growth chart fetal weight chart full term for twins twin fetal growth chart twin pregnancy week by week Twin pregnancy: Your complete guide twin weight chart

The estimated mean fetal weight by Ultrasound was 3.43 ± 0.47 kg, while the mean birth weight was 3.48 ± 0.80 kg. There was no significant difference between the mean fetal weight estimated by Ultrasound scan and the mean birth weight (-value = 0.8). 0nly 2 (1.18%) had low birth weight while macrosomia was recorded in 20 (11.76%). Majority of. For fetal weight specifically, the two most important parameters are BPD (diameter across baby's skull) and AC. What Is An Ideal Fetal Weight? Please bear in mind that the ideal fetal weight is only an average as in the initial stages babies tend to grow at varying rates

Body Mass Index (BMI) and Pregnancy Unhealthy Weight and Pregnancy (For patients) Reviewed By Medical Advisory Board Unhealthy Weight and Pregnancy Unhealthy weight increases the risk of many health conditions including hypertension and diabetes, and avoiding the subject of unhealthy weight gain misses an opportunity to possibly prevent or treat many weight related illnesses [1-4] EFW Calculator EFW Using 2D Biometry with Fractional Limb Volume New fetal weight estimation models have been finalized and this calculator allows the user to enter sonographic measurements for EFW that is based on 2D and 3D parameters Calculate estimated fetal weight based on sonographic measurements, such as abdominal circumference, as well as soft tissue parameters such as fractional arm volume (AVol) or fractional thigh volume (TVol). Fetal Heart Biometry - Z Scores Based on FDL, MA, or BPD

This value can vary however according to the health condition of the mother and the fetal development as pregnant women that have a bigger weight tend to put on less than 1 lb per week. Check the results in this pregnancy weight calculator to see how your pregnancy is standing for each of the 40 weeks Male Newborn Percentile. Welcome to BabyPercent.com, an online calculator for determining growth percentiles for weight, length and head circumference in newborns aged 23-41 weeks of gestation. Make sure you're at the right page for either a male or female baby, then enter your baby's measurements of weight, length and head circumference.

Fetal Weight Percentile Calculator Kg Karl Metts April 16, 2018 Estimation of fetal weight estimation of fetal weight estimation of fetal weight uncommon baby birth weight percentil fetal weight calculator. Discussion in 'Pregnancy - Third Trimester' started by jackie.d, Dec 29, 2009. jackie.d Mum to 3 boys + 1 girl. If both fetal weight for gestational age and the velocity of fetal weight gain are abnormal, the evidence for a significant abnormality in fetal growth becomes more compelling. Under such circumstances, manage the pregnancy accordingly, with the presumption that the fetal size is outside the reference range of expected values Grab a calculator and the ultrasound measurements, and use the formula below. Estimated fetal weight = 1,687.47 + (54.1 x femur length in millimeters) + (76.68 x Soft tissue thickness of thigh in millimeters) 4. Ask a midwife. They have a better accuracy rate than doctors when assessing fetal weight. Tips and Warnings

Fetal weight calculator. WHO Child Growth Standards: boys. Baby calendar. BMI Calculator (Body Mass Index) Daily calorie needs. Numbers chart maker for kids (1-10) Apgar score. Count and color worksheets maker (1-10) Amara says: 2017-05-03 at 22:01. Ok. Amara says: 2017-05-03 at 22:02. Ok no problem What is claimed is: 1. Apparatus for fetal weight determination comprising: an ultrasonic imager operative to image a fetus in utero and to provide output image data in respect thereof; an image processor operative automatically to initially recognize and then to measure at least one dimension of at least one fetal body part based on said output image data and to provide output body part. Fetal Growth Chart. (crown to rump measurements) Gestational Age. Length (inches) Weight (oz/lb) Length (cm) Mass (g) 8 weeks. 0.63 A fetal weight calculator, preferably fetal weight calculator 116 (FIG. 1) provides an estimate of fetal weight and employs for this purpose the measurements carried out by the measurement tool as well as preferably also archived inputs, such as, for example, information relating to at least one of measurement data derived from measurements of.

Due Date Calculator: When is Ovulation: Fertility Calculator: Safe Period Calculator: Fetal Growth Calculator: Fetal Size Calculator: Pregnancy Week by Week (1 to 42) Pregnancy Trimester - First Trimester - Second Trimester - Third Trimester: Pregnancy months - Growth in 1 st month - Growth in 2 nd month - Growth in 3 rd month - Growth in 4 th. Interactive Estimated Fetal Weight Calculation within the Babson and Benda's chart for pre-term infants. Use of the Hadlock, Campbell, Warsoff, and Ott formulas to calculate and plot the Estimated Fetal Weight(EFW) as a function of any EGA week using the Babson and Benda's chart Safe period calculator: Fetal Growth calculator: Fetal Size calculator: Fetus week by week: Fetus month by month: Pregnancy Trimester: Signs or Symptoms of Pregnancy: Pregnancy Tests: Birth Control: Other: Gender calculator: Clothing conversion: Shoe size conversion: Weight on other planets: Referenc

Pregnancy Calendar and Due Date Calculator. Calculate Based On: Last Period Conception Date Due Date. Your Due Date *. Calculate! Your Conception Date *. Calculate! This is not a diagnosis. The calculations that are provided are estimates based on averages Fetal weight estimation is of key importance in the decision-making process for obstetric planning and management. The literature is inconsistent on the accuracy of measurements with either ultrasound or clinical examination, known as Leopold's manoeuvres, shortly before term. Maternal BMI is a confounding factor because it is associated with both the fetal weight and the accuracy of fetal.

A Gestational Weight Gain (GWG) calculator will be an evolution of current practice. The current GWG recommendations are based on four BMI bands: underweight, healthy, overweight and obese. This configuration was necessary when paper GWG charts are used. An electronic calculator will be programmed to allow continuous adjustment of the GWG. Calculation of the weight of a fetus is done using ultrasound, which can monitor both the growth and the weight of the fetus. Discover how to calculate the w.. Birth weights vary. Mean birth weight can be described as a function of gestational age. Standard fetal-growth curves are used to estimate the range of expected fetal weight for populations of women at any particular gestational age, but they are not applicable to specific individual women because of variations in fetal weight and in birth weights in neonates among different racial groups Ultrasonographic Fetal Weight Estimation: Should Macrosomia-Specific Formulas Be Utilized? Porter B(1), Neely C(2), Szychowski J(2), Owen J(2). Author information: (1)Division of Maternal-Fetal Medicine, Department of Obstetrics and Gynecology, University of Missouri, Kansas City, Missouri

CALCULATIONS IN ESTIMATING FETAL WEIGHT ROBERT W. JOHNSON, M.D., DENVER, COLO. (From the Department of Obstetrics and Gynecology, University of Colorado School of Medicine) A METHOD for estimating fetal weight in utero with the use of McDonald's measurement (height of fundus with a tape measure) was published in September, 1954.1 The standard deviation for this method was found to be 12.45. Twin growth discordance is a term used in obstetric imaging to describe a significant size or weight difference between the two fetuses of a twin pregnancy.To be classified as a growth discordance, some consider that the estimated fetal weight (EFW) of the smaller twin should fall under the 10 th centile This retrospective cohort study included a total of 1220 sonographic fetal weight estimations performed within seven days of delivery and recorded at a single medical center from January 2014 to December 2016. Estimated fetal weight was calculated using H1 and H2 formulas Fetal weight estimation methods have been discussed by various authors. Tactile assessment of foetal size Dare et al used this technique by multiplying the abdominal girth (cm) with symphysiofundal height (cm) and calculated the estimated foetal weight in grams (21).However, this is les Objectives Construct updated birth weight-for-gestational age centile charts for use in the UK and compare these to the currently used UK-WHO charts. Design Secondary analysis of national birth data. Participants Centiles were constructed using 1 269 403 singleton births occurring in England and Wales in 2013-2014 as part of the MBRRACE-UK national perinatal surveillance programme Fetal size and dating: charts recommended for clinical obstetric practice Pam Loughna1, Lyn Chitty2, Tony Evans3 & Trish Chudleigh4 1Academic Division of Obstetrics and Gynaecology, Nottingham University Hospitals NHS Trust, 2Genetics and Fetal Medicine, Institute of Child Health and University College London Hospitals NHS foundation Trust, London, 3Medical Physics, University of Leeds, Leeds an