Specific ultrasound parameters, the estimated fetal weight
, the proportion with EFW < third percentile, and HC/AC > 95th percentile did not differ significantly between these two groups.
Differences in abdominal circumference paralleled the differences in estimated fetal weight
A non-systematic search in the PubMed was undertaken using terms "birthweight" combined with "gestational age," "menstrual dating," "ultrasound dating," "estimated fetal weight
," "customized growth charts," "malformation," "stillbirth," "family influence," and "individualized BW ratio," respectively.
Sample size calculation suggested that 340 participants would be needed to give a precision of 5% around an observed percentage of estimated fetal weights
correct to within 10% of the birth weight.
However, ACOG focuses only on the estimated fetal weight
. Indeed, its new guidelines say that, to avoid the risk of shoulder dystocia, practitioners should consider offering an elective cesarean section when the estimated fetal weight
is 4,500 grams (9.9 pounds) in diabetic mothers and 5,000 grams (11 pounds) in non-diabetic mothers.
Included some high-risk pts (diabetes or hypertension) Rainford (22) NICU 2 admissions, 5-minute Apgar scores Zhang (23) Fetal growth, Benefit of 2 CS, low routine Apgar, ultrasound overall was the neonatal primary study morbidity outcome study endpoint AFI, amniotic fluid index; CI, confidence interval; CS, cesarean section; EFW, estimated fetal weight
; IUGR, intrauterine growth restriction; LOE, level of evidence; NICU, neonatal intensive care unit; OR, odds ratio; RR, relative risk.
Fetal growth restriction was defined as an estimated fetal weight
2.0 SD below the mean expected weight for gestational age (GA), as determined by ultrasonographic evaluation.
Gross estimated fetal weight
to be approximately 8 pounds.
 Calculate the estimated fetal weight
(EFW) and plot according to a growth chart for the corresponding gestation, using the INTERGROWTH-21st charts.
Clearly, the informed consent of a 42-year-old who had in vitro fertilization and has a floating presentation with a low Bishop score and an estimated fetal weight
of 4,000 at 40 6/7 weeks must include not only the risks of primary CD but also the risks of a long labor that may result in a CD, the occasional risk of shoulder dystocia, or third- or fourth-degree extension.
The estimated fetal weight
was 874 grams (27th percentile) at 26 weeks and 1306 grams (26th percentile) at 29 weeks.
CS: Cesarean section EFW: Estimated fetal weight
GA: Gestational age HC: Head circumference IUGR: Intrauterine growth restriction L: Length LBWI: Low birth weight infants NIDCAP: Newborn Individualized Developmental Care and Assessment Program NICU: Newborn Intensive Care Unit PROM: Premature rupture of the membrane SGA: Small for gestational age VD: Vaginal delivery VLBW: Very low birth weight W: Weight.