Talk:Ultrasound: Difference between revisions

Revision as of 17:01, 9 April 2010

Fetal volume and crown-rump length from 7 to 10 weeks of gestational age in singletons and twins. Martins WP, Nastri CO, Barra DA, Navarro PA, Mauad Filho F, Ferriani RA. Eur J Obstet Gynecol Reprod Biol. 2009 Jul;145(1):32-5. Epub 2009 Apr 21. PMID: 19386409

"Twins and singletons had similar fetal volume and crown-rump length between the 7th and 10th week of gestational age. Additionally, fetal volume assessed by VOCAL was better than crown-rump length to estimate the gestational age at the evaluated period. However, the improvement was small and probably without clinical significance. CONDENSATION: Fetal volume and crown-rump length were similar between singletons and twins. Fetal volume relative increase was higher and the predicted gestational age was better."

Fetal crown-rump length and estimation of gestational age in an ethnic Chinese population. Sahota DS, Leung TY, Leung TN, Chan OK, Lau TK. Ultrasound Obstet Gynecol. 2009 Feb;33(2):157-60. PMID: 19115262

"The best-fit equation for the sonographic estimate of gestational age (GA, in days) from CRL (in mm) was GA = 26.643 + 7.822 x CRL(1/2)(R(2) = 0.96). The mean difference between menstrual age and the predicted gestational age was 0.22 days (95% CI, - 0.14 to 0.56), which was lower than that of the three established CRL dating formulae. CONCLUSION: We have derived a formula suitable for the dating of naturally conceived pregnancies between 6 and 15 weeks of gestation that has no systematic prediction error (the 95% CI of mean difference between predicted and menstrual age included zero), comparing favorably with established CRL dating formulae."

Fetal size in the second trimester is associated with the duration of pregnancy, small fetuses having longer pregnancies. Johnsen SL, Wilsgaard T, Rasmussen S, Hanson MA, Godfrey KM, Kiserud T. BMC Pregnancy Childbirth. 2008 Jul 16;8:25. PMID: 18627638 | BMC

Fetal age assessment based on 2nd trimester ultrasound in Africa and the effect of ethnicity.

Salpou D, Kiserud T, Rasmussen S, Johnsen SL. BMC Pregnancy Childbirth. 2008 Oct 30;8:48. PMID: 18973673

Ultrasonic evaluation of fetal limb growth.

Jeanty P, Kirkpatrick C, Dramaix-Wilmet M, Struyven J. Radiology. 1981 Jul;140(1):165-8. PMID: 7244221

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 :"The best-fit equation for the sonographic estimate of gestational age (GA, in days) from CRL (in mm) was GA = 26.643 + 7.822 x CRL(1/2)(R(2) = 0.96). The mean difference between menstrual age and the predicted gestational age was 0.22 days (95% CI, - 0.14 to 0.56), which was lower than that of the three established CRL dating formulae. CONCLUSION: We have derived a formula suitable for the dating of naturally conceived pregnancies between 6 and 15 weeks of gestation that has no systematic prediction error (the 95% CI of mean difference between predicted and menstrual age included zero), comparing favorably with established CRL dating formulae."
+* Fetal size in the second trimester is associated with the duration of pregnancy, small fetuses having longer pregnancies. Johnsen SL, Wilsgaard T, Rasmussen S, Hanson MA, Godfrey KM, Kiserud T. BMC Pregnancy Childbirth. 2008 Jul 16;8:25. [http://www.ncbi.nlm.nih.gov/pubmed/18627638 PMID: 18627638] | [http://www.biomedcentral.com/1471-2393/8/25 BMC]
+* Fetal age assessment based on 2nd trimester ultrasound in Africa and the effect of ethnicity.
+Salpou D, Kiserud T, Rasmussen S, Johnsen SL.
+BMC Pregnancy Childbirth. 2008 Oct 30;8:48.
+PMID: 18973673
+* Ultrasonic evaluation of fetal limb growth.
+Jeanty P, Kirkpatrick C, Dramaix-Wilmet M, Struyven J.
+Radiology. 1981 Jul;140(1):165-8.
+PMID: 7244221