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ULTRASOUND AND DATING

Page history last edited by Katrina Nardini 1 year, 11 months ago

ULTRASOUND AND DATING

Error Factor for Menstrual Age Dating: The 8% Factor

Example: 19wks 4days: 19x7 = 133+4 = 137 --> 137x0.08 = +/-10.96 days

 

1 wk +/- 0.56 days

2 wks +/- 1.12 days

3 wks +/- 1.68 days

4 wks +/- 2.24 days

5 wks +/- 2.80 days

6 wks +/- 3.36 days

7 wks +/- 4.41 days

8 wks +/- 4.48 days

9 wks +/- 5.04 days

10 wks +/- 5.60 days

11 wks +/- 6.16 days

12 wks +/- 6.70 days

13 wks +/- 7.28 days

14 wks +/- 7.48 days

15 wks +/- 8.40 days

16 wks +/- 8.96 days

17 wks +/- 9.52 days

18 wks +/- 10.08 days

19 wks +/- 10.64 days

20 wks +/- 11.20 days

21 wks +/- 11.76 days

22 wks +/- 12.32 days

23 wks +/- 12.88 days

24 wks +/- 13.44 days

25 wks +/- 14.00 days

26 wks +/- 14.56 days

27 wks +/- 15.12 days

28 wks +/- 15.60 days

29 wks +/- 16.24 days

30 wks +/- 16.80 days

31 wks +/- 17.36 days

32 wks +/- 17.92 days

33 wks +/- 18.48 days

34 wks +/- 19.04 days

35 wks +/- 19.60 days

36 wks +/- 20.16 days

37 wks +/- 20.72 days

38 wks +/- 21.28 days

39 wks +/- 21.84 days

40 wks +/- 22.40 days

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