Table 1.

Serial fetal biometry, biophysical profile score, and other sonographic findings.

Sonographic characteristic	28 weeks of gestation	32 weeks of gestation	36 weeks of gestation
Fetal biometry (mm)
Biparietal diameter	81	86	93
Head circumference	289	314	331
Abdominal circumference	275	287	347
Femur length	56	61	72
Estimated fetal weight (kg)	1.7	2.1	3.4
Deepest vertical pocket (cm)	4	4	5
Uterine artery pulsatility index	0.9	0.8	1.0
Biophysical profile score	-*	>4	>4

*Fetal biophysical variables are not assessed at or before 28 weeks of gestation.