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Gestational Sac Measurement

 

Mean Predicted Gestational Sac (cm) Gestational Age (weeks) Mean Predicted Gestational Sac (cm) Gestational Age (weeks)
1.0 5.0 3.6 8.8
1.1 5.2 3.7 8.9
1.2 5.3 3.8 9.0
1.3 5.5 3.9 9.2
1.4 5.6 4.0 9.3
1.5 5.8 4.1 9.5
1.6 5.9 4.2 9.6
1.7 6.0 4.3 9.7
1.8 6.2 4.4 9.9
1.9 6.3 4.5 10.0
2.0 6.5 4.6 10.2
2.1 6.6 4.7 10.3
2.2 6.8 4.8 10.5
2.3 6.9 4.9 10.6
2.4 7.0 5.0 10.7
2.5 7.2 5.1 10.9
2.6 7.3 5.2 11.0
2.7 7.5 5.3 11.2
2.8 7.6 5.4 11.3
2.9 7.8 5.5 11.5
3.0 7.9 5.6 11.6
3.1 8.0 5.7 11.7
3.2 8.2 5.8 11.9
3.3 8.3 5.9 12.0
3.4 8.5 6.0 12.2

From Hellman LM, Kobayashi M, Fillisti L et al.: Growth and development of the human fetus prior to the twentieth week of gestation. Amer J Obstet Gynecol 103:789, 1969

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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

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