Fetal Growth Chart

(crown to rump measurements)

Gestational Age	Length (inches)	Weight (oz/lb)	Length (cm)	Mass (g)
8 weeks	0.63	0.04 oz	1.6	1
9 weeks	.9	0.07 oz	2.3	2
10 weeks	1.22	0.14 oz	3.1	4
11 weeks	1.61	0.25 oz	4.1	7
12 weeks	2.13	0.49 oz	5.4	14
13 weeks	2.19	0.81 oz	7.4	23
14 weeks	3.42	1.52 oz	8.7	43
15 weeks	3.98	2.47 oz	10.1	70
16 weeks	4.57	3.53 oz	11.6	100
17 weeks	5.12	4.94 oz	13	140
18 weeks	5.59	6.70 oz	14.2	190
19 weeks	6.02	8.47 oz	15.3	240
20 weeks	6.46	10.58 oz	16.4	300
21 weeks	10.51	12.70 oz	26.7	360
22 weeks	10.94	15.17 oz	27.8	430
23 weeks	11.38	1.10 lb	28.9	501
24 weeks	11.81	1.32 lb	30	600
25 weeks	13.62	1.46 lb	34.6	660
26 weeks	14.02	1.68 lb	35.6	760
27 weeks	14.41	1.93 lb	36.6	875
28 weeks	14.80	2.22 lb	37.6	1005
29 weeks	15.2	2.54 lb	38.6	1153
30 weeks	15.71	2.91 lb	39.9	1319
31 weeks	16.18	3.31 lb	41.1	1502
32 weeks	16.19	3.75 lb	42.4	1702
33 weeks	17.20	4.23 lb	43.7	1918
34 weeks	17.72	4.73 lb	45	2146
35 weeks	18.19	5.25 lb	46.2	2383
36 weeks	18.66	5.78 lb	47.4	2622
37 weeks	19.13	6.30 lb	48.6	2859
38 weeks	19.61	6.80 lb	49.8	3083
39 weeks	19.96	7.25 lb	50.7	3288
40 weeks	20.16	7.63 lb	51.2	3462
41 weeks	20.35	7.93 lb	51.7	3597
42 weeks	20.28	8.12 lb	51.5	3685
43 weeks	20.20	8.19 lb	51.3	3717

Source: University of South Carolina