References
- Rasmussen SA, Wong LY, Yang Q, May KM, Friedman JM. Population-based analyses of mortality in trisomy 13 and trisomy 18. Pediatrics 2003;111:777–784.
- Lai S, Lau WL, Leung WC, Lai FK, Chin R. Is ultrasound alone enough for prenatal screening of trisomy 18? A single centre experience in 69 cases over 10 years. Prenat Diagn 2010;30:1094–1099.
- Cheng PJ, Liu CM, Chueh HY, Lin CM, Soong YK. First-trimester nuchal translucency measurement and echocardiography at 16 to 18 weeks of gestation in prenatal detection for trisomy 18. Prenat Diagn 2003;23:248–251.
- Yeo L, Guzman ER, Day-Salvatore D, Walters C, Chavez D, Vintzileos AM. Prenatal detection of fetal trisomy 18 through abnormal sonographic features. J Ultrasound Med 2003;22:581–590.