APPENDIX 4 - ULTRASOUND MEASUREMENTS

The following table gives the average values of the most used ultrasound scan measurements. Sophisticated ultrasound scan machines are able to measure the circumference of the skull and the estimated weight of the fetus.

WEEKS	BPD	CR	FEMUR	CIRC	WEIGHT
5 6 7 8 9 10		15 22 30
11 12 13 14 15	23 28 31	40 52 64 78	8 11 15 18	70 89 98 111
16 17 18 19 20	34 37 40 44 48		21 24 27 30 33	124 137 150 163 175	240 320 400
21 22 23 24 25	50 53 56 59 61		36 39 42 44 47	187 199 210 221 232	480 560 640 720 800

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