Home

Online Teaching Files

Literature Search and Reviews

Bulletin Board

Reference Charts and Tables

Recommended Links





 


PREDICTED MENSTRUAL AGE (WEEKS) FROM CRL MEASUREMENTS (CM)

CRL MA CRL MA CRL MA CRL MA CRL MA CRL MA
0.2 5.7 2.2 8.9 4.2 11.1 6.2 12.6 8.2 14.2 10.2 16.1
0.3 5.9 2.3 9.0 4.3 11.2 6.3 12.7 8.3 14.2 10.3 16.2
0.4 6.1 2.4 9.1 4.4 11.2 6.4 12.8 8.4 14.3 10.4 16.3
0.5 6.2 2.5 9.2 4.5 11.3 6.5 12.8 8.5 14.4 10.5 16.4
0.6 6.4 2.6 9.4 4.6 11.4 6.6 12.9 8.6 14.5 10.6 16.5
0.7 6.6 2.7 9.5 4.7 11.5 6.7 13.0 8.7 14.6 10.7 16.6
0.8 6.7 2.8 9.6 4.8 11.6 6.8 13.1 8.8 14.7 10.8 16.7
0.9 6.9 2.9 9.7 4.9 11.7 6.9 13.1 8.9 14.8 10.9 16.8
1.0 7.2 3.0 9.9 5.0 11.7 7.0 13.2 9.0 14.9 11.0 16.9
1.1 7.2 3.1 10.0 5.1 11.8 7.1 13.3 9.1 15.0 11.1 17.0
1.2 7.4 3.2 10.1 5.2 11.9 7.2 13.4 9.2 15.1 11.2 17.1
1.3 7.5 3.3 10.2 5.3 12.0 7.3 13.4 9.3 15.2 11.3 17.2
1.4 7.7 3.4 10.3 5.4 12.0 7.4 13.5 9.4 15.3 11.4 17.3
1.5 7.9 3.5 10.4 5.5 12.1 7.5 13.6 9.5 15.3 11.5 17.4
1.6 8.0 3.6 10.5 5.6 12.2 7.6 13.7 9.6 15.4 11.6 17.5
1.7 8.1 3.7 10.6 5.7 12.3 7.7 13.8 9.7 15.5 11.7 17.6
1.8 8.3 3.8 10.7 5.8 12.3 7.8 13.8 9.8 15.6 11.8 17.7
1.9 8.4 3.9 10.8 5.9 12.4 7.9 13.9 9.9 15.7 11.9 17.8
2.0 8.6 4.0 10.9 6.0 12.5 8.0 14.0 10.0 15.9 12.0 17.9
2.1 8.7 4.1 11.0 6.1 12.6 8.1 14.1 10.1 16.0 12.1 18.0

* The 95% confidence interval is + 8% of the predicted age.

From Hadlock FP, Shah YP, Kanon DJ, Lindsey JV: Fetal crown-rump length: reevaluation of relation to menstrual age (5-18 weeks) with high-resolution real-time US. Radiology 182:501-505, 1992.

This is a clickable imagemap, for hyperlinks, see text below.
Ultrasound Educational Press     Go Top
Peter W. Callen, M.D.
Professor of Radiology, Obstetrics, Gynecology and Reproductive Science
University of California Medical Center, San Francisco, California

Home | Teaching Files | Literature | Bulletin Board