EFW in pregnancy stands for Estimated Fetal Weight.
Understanding Estimated Fetal Weight (EFW)
EFW is a calculation used during pregnancy to estimate the weight of the fetus. It is typically determined through ultrasound measurements of the fetus. These measurements usually include:
- Head Circumference (HC)
- Abdominal Circumference (AC)
- Femur Length (FL)
According to the provided reference, after taking the indicated measurements, calculating the estimated fetal weight will indicate the corresponding percentile and a graphical representation.
How EFW is Calculated and Used
The doctor inputs these measurements into a formula, or uses a machine that has it pre-programmed, to arrive at the EFW. The EFW helps in:
- Assessing Fetal Growth: EFW helps determine if the fetus is growing at a healthy rate.
- Identifying Potential Problems: Significant deviations from the expected weight range can indicate potential growth restriction or macrosomia (excessive fetal size).
- Guiding Delivery Decisions: EFW is a factor in deciding the mode and timing of delivery. For example, a very large EFW might influence the decision to perform a Cesarean section.
