References
- Morgan S, Delbarre A, Ward P. Impact of introducing a national policy for prenatal Down syndrome screening on the diagnostic invasive procedure rate in England. Ultrasound Obstet Gynecol 2013;41:526–9
- Blumenfeld YJ, Chueh J. Chorionic villus sampling: technique and training. Curr Opin Obstet Gynecol 2010;22:146–51
- Jackson LG, Zachary JM, Fowler SE, et al. A randomized comparison of transcervical and transabdominal chorionic-villus sampling. The U.S. National Institute of Child Health and Human Development Chorionic-Villus Sampling and Amniocentesis Study Group. N Engl J Med 1992;327:594–8
- Brambati B, Lanzani A, Tului L. Transabdominal and transcervical chorionic villus sampling: efficiency and risk evaluation of 2,411 cases. Am J Med Genet 1990;35:160–4
- Wax JR, Cartin A, Chard R, et al. First trimester transabdominal chorionic villus sampling--does the needle matter? J Clin Ultrasound 2012;40:385–8
- Newport M, Coleman DV, McPherson K. Estimation of the weight of chorionic villus samples obtained from first trimester pregnancies by transcervical aspiration. Prenat Diagn 1986;6:265–9
- Iliescu D, Tudorache S, Comanescu A, et al. Improved detection rate of structural abnormalities in the first trimester using an extended examination protocol. Ultrasound Obstet Gynecol 2013;42:300–9
- Battagliarin G, Lanna M, Coviello D, et al. A randomized study to assess two different techniques of aspiration while performing transabdominal chorionic villus sampling. Ultrasound Obstet Gynecol 2009;33:169–72
- Jahoda MG, Brandenburg H, Reuss A, et al. Transcervical (TC) and transabdominal (TA) CVS for prenatal diagnosis in Rotterdam: experience with 3611 cases. Prenat Diagn 1991;11:559–61
- Brambati B, Terzian E, Tognoni G. Randomized clinical trial of transabdominal versus transcervical chorionic villus sampling methods. Prenat Diagn 1991;11:285–93
- Silver RK, MacGregor SN, Muhlbach LH, et al. Congenital malformations subsequent to chorionic villus sampling: outcome analysis of 1048 consecutive procedures. Prenat Diagn 1994;14:421–7
- Fortuny A, Borrell A, Soler A, et al. Chorionic villus sampling by biopsy forceps. Results of 1580 procedures from a single centre. Prenat Diagn 1995;15:541–50