Jorde, Lynn B.; Carey, John C.; Bamshad, Michael J. (2009). Medical Genetics (4 ed.). Elsevier Health Sciences. p. 109. ISBN978-0323075763. Archived from the original on 2016-10-02.
Papp C, Ban Z, Szigeti Z, Csaba A, Beke A, Papp Z (2007). "Role of second trimester sonography in detecting trisomy 18: a review of 70 cases". J Clin Ultrasound. 35 (2): 68–72. doi:10.1002/jcu.20290. PMID17206726. S2CID23836946.
Smith, David W.; Patau, Klaus; Therman, Eeva; Inhorn, Stanley L. (September 1, 1960). "A new autosomal trisomy syndrome: multiple congenital anomalies caused by an extra chromosome". The Journal of Pediatrics. 57 (3): 338–345. doi:10.1016/S0022-3476(60)80241-7. PMID13831938.
Patau, Klaus; Therman, Eeva; Smith, David W.; DeMars, Robert I. (January 19, 1961). "Trisomy for chromosome no. 18 in man". Chromosoma. 12 (1). Berlin: 280–5. doi:10.1007/BF00328924. PMID13733243. S2CID2105207.
Hurt K, Sottner O, Záhumenský J, et al. (2007). "[Choroid plexus cysts and risk of trisomy 18. Modifications regarding maternal age and markers]". Ceska Gynekol (in Czech). 72 (1): 49–52. PMID17357350.
Papp C, Ban Z, Szigeti Z, Csaba A, Beke A, Papp Z (2007). "Role of second trimester sonography in detecting trisomy 18: a review of 70 cases". J Clin Ultrasound. 35 (2): 68–72. doi:10.1002/jcu.20290. PMID17206726. S2CID23836946.
Smith, David W.; Patau, Klaus; Therman, Eeva; Inhorn, Stanley L. (September 1, 1960). "A new autosomal trisomy syndrome: multiple congenital anomalies caused by an extra chromosome". The Journal of Pediatrics. 57 (3): 338–345. doi:10.1016/S0022-3476(60)80241-7. PMID13831938.
Patau, Klaus; Therman, Eeva; Smith, David W.; DeMars, Robert I. (January 19, 1961). "Trisomy for chromosome no. 18 in man". Chromosoma. 12 (1). Berlin: 280–5. doi:10.1007/BF00328924. PMID13733243. S2CID2105207.
"trisomy 18". GHR. March 2012. Archived from the original on 2 October 2016. Retrieved 1 October 2016.
orpha.net
"Trisomy 18". Orphanet. May 2008. Archived from the original on 3 October 2016. Retrieved 1 October 2016.
semanticscholar.org
api.semanticscholar.org
Papp C, Ban Z, Szigeti Z, Csaba A, Beke A, Papp Z (2007). "Role of second trimester sonography in detecting trisomy 18: a review of 70 cases". J Clin Ultrasound. 35 (2): 68–72. doi:10.1002/jcu.20290. PMID17206726. S2CID23836946.
"Trisomy 18". Orphanet. May 2008. Archived from the original on 3 October 2016. Retrieved 1 October 2016.
"trisomy 18". GHR. March 2012. Archived from the original on 2 October 2016. Retrieved 1 October 2016.
Jorde, Lynn B.; Carey, John C.; Bamshad, Michael J. (2009). Medical Genetics (4 ed.). Elsevier Health Sciences. p. 109. ISBN978-0323075763. Archived from the original on 2016-10-02.
"Prevalence and Incidence of Edwards Syndrome". Diseases Center-Edwards Syndrome. Adviware Pty Ltd. 2008-02-04. Archived from the original on 2004-06-25. Retrieved 2008-02-17. mean maternal age for this disorder is 32½
"Prevalence and Incidence of Edwards Syndrome". Diseases Center-Edwards Syndrome. Adviware Pty Ltd. 2008-02-04. Archived from the original on 2004-06-25. Retrieved 2008-02-17. mean maternal age for this disorder is 32½