Ulna Length

Chervenak FA, Isaacson GC, Campbell S (eds)

Ultrasound in Obstetrics and Gynecology 1992;

Table A1-12:pg 1783.

Boston: Little, Brown and Company

GA (wks)	-2SD	Mean	+2SD
12	7.8	9	10.2
13	7.6	11.2	14.8
14	8.9	12.7	16.5
15	9.4	15.4	21.4
16	13.4	19.8	26.2
17	17.8	22.8	27.8
18	21.4	25.6	29.8
19	24	28.6	33.2
20	26.1	30.7	35.3
21	28.7	33.3	37.9
22	29.9	34.9	39.9
23	32.9	37.9	42.9
24	34	39.4	44.8
25	35.4	40.4	45.4
26	38.5	42.5	46.5
27	40.1	45.5	50.9
28	42.7	47.7	52.7
29	43.2	48.8	54.4
30	43.5	49.7	55.9
31	45.8	52.6	59.4
32	49.5	53.3	57.1
33	47	54	61
34	50.5	55.3	60.1
35	51.8	57.6	63.4
36	52.3	58.3	64.3
37	54.9	61.5	68.1
38	55.1	60.5	65.9
39	55.8	61.8	67.8
40	56.3	63.1	69.9
41	58.2	63.2	68.2
42	58.2	64	69.8