Table 2: Results of three small trials of routine serial prenatal ultrasound screening1

Variable
Eik-Nes et al  1984<7>
Bakketeig et al2  1984<8>
Neilson et al 1984<9>
No. (& %) of  hospital admissions
Experimental Group 184 (22.5)  79 (15.5)  43 (9.9)
Control Group 269 (33.2)3 46 (9.5)3 46 (10.3)
No. (& %) of infants with low Apgar score4 at 1 minute
Experimental Group NM  34 (6.9) 37 (9.9)
Control Group NM  23 (4.9) 40 (9.0)
At 5 minutes
Experimental Group NM 15 (3.1)  8 (1.9)
Control Group NM 9 (1.9)  5 (1.0)
No. (and %) of perinatal deaths
Experimental Group 3 (0.36) 5 (0.98) 0 (0.00) 
Control Group 8 (0.98) 5 (1.00) 1 (0.02)

1 NM = not measured
2 Results are given for singleton births only.
3 p = 0.05
4 Seven or less in study by Bakketeig et al and less than 7 in study by Neilson et al.