Prenatal screening by ultrasound is increasing in the United States. I
n 1990, 52 percent of mothers who had live births received ultrasound,
compared with 48 percent in 1989 (Monthly Vital Stat Rep 1993,42:2(S)
:6). A recent multicenter, randomized study of 15,151 low-risk pregnan
t women, conducted by the Routine Antenatal Diagnostic Imaging With Ul
trasound (RADIUS) Study Group, reported no significant differences in
pregnancy outcomes between women who received no ultrasound scan and w
omen who received two scans during pregnancy (N Engl J Med 1993;329:82
1-827). Ewigman et al concluded, ''The adoption of routine ultrasound
screening in the United States would add considerably to the cost of c
are in pregnancy, with no improvement in perinatal outcome.'' This int
erview and discussion took place at the Tenth Birth Conference, Octobe
r 31-November 1, 1992, in Boston. It was conducted by Max Allen, produ
cer, Canadian Broadcasting Corporation, and broadcast as part of a rad
io program, ''Birth and Technology,'' on CBC Ideas, February 15, 1993.