Table 2. The number of tibial bone SOS measurements with different size probes by age.

	CS probe	CR probe	CM probe
#CGA<40w	162	54	14
0-1m	10	48	16
1-2m	5	51	76
2-4m	0	20	185
4-6m	0	0	192
6-8m	0	0	162
8-10m	0	0	132
10-12m	0	0	137
12-15m	0	0	88
Total (%)	177 (13.1)	173 (12.8)	1002 (74.1)

#CGA: corrected gestational age.