Presentation
Healthy pregnant woman in a routine ultrasound at 16 weeks and 5 days gestation.
Patient Data
Age: 30 years
Gender: Female
From the case:
Normal fetal biometry of a 16 weeks' gestational age
Download
Info
- Gestational age (GA) based on last menstrual period (LMP): 16w5d
- Number of fetuses: 1
- Head circumference (HC): 128.8 mm
- Occipitofrontal diameter (OFD): 46.3 mm
- Biparietal diameter (BPD): 34.3 mm
- Abdominal circumference (AC): 103.3 mm
- Femur length (FL): 22.8 mm
- Fetal heart rate (FHR): 146 b/min
- Estimate of fetal weight (EFW): 161.2 g
- Arithmetic ultrasound age (AUA): 16w4d
Case Discussion
Initially, the GA informed by our pregnant patient was of 16 weeks and 5 days, which was calculated based on LMP. The final gestational age calculation (the AUA) resulted only in 1 day discrepancy with LMP, and this is within the acceptable margin of error.
The selected images demonstrate a 16 weeks' gestational age ultrasound and its appropriate measurements of fetal biometry.
Contributed by Dr. Guilherme Pioli Resende M.D., Dr. Rebecca Carolina Silva Lins M.D. and Dr. Arthur Ataide Lopes M.D.
Unable to process the form. Check for errors and try again.