27. Roull. J. Ernesto. Factores de riesgo del bajo peso al nacer. Rev. Cub. Gen. Integral. 1999; 12(3); 270-274
28. Gonzáles Cheda., Víctor; Factores de riesgo en el bajo peso al nacer Rev. Cub. Gen Obst y gin 14 (1): 7, 1998
29. Ceron Mineles -P y otros. Condition of maternal monk and low birth Weight in, México City. Centro de Investigación en salud publica (I N S P)-México 2005 Jun – Feb.39 (1):2-10
30. Días Tabares, Orlen y otros. Aspectos epidemiológicos del bajo peso al nacer. Rev. Cub. Gen. Integral 11 (3); 239 -245 julio septiembre 1998
31. Pérez Q. Ramón y otros. Bajo peso al nacer y embarazo en la adolescencia en cinco consultorios del médico de familia 1998
32. Programa para la reducción del bajo peso al nacer. Disponible en: http://aps.sld.cu/bvs/ materiales/programa/ maternoinfantil/bp.pdf. Visitado 9 de Marzo de 2006.
33. Bajo peso al nacer.Algunos factores asociados a la madre. Disponible en http://aps.sld.cu/bvs/ materiales/programa/ maternoinfantil/bp.pdf. visitado 9 de Marzo de 2006.
34. Bajo peso al nacer. Algunos factores asociados a la madre. Disponible en: http://www.bvs.sld.cu /revistas/ gin/vol31_1_05/ gin05105.htm visitado 9 de Marzo de 2006.
35. Factores de riesgo en el bajo peso al nacer. Disponible en: http://www.bvs.sld. cu/revistas/mgi/ vol16_1_00/mgi 12100.htm visitado 9 de Marzo de 2006.
36. Repercusión de los Factores de Riesgo en el Bajo Peso al Nacer. Disponible en: http://www.bvs.sld. cu/ revistas/ res/vol14_3_01/ res02301.htm visitado 9 de Marzo de 2006.
37. Edad materna, riesgo nutricional preconcepcional y peso al nacer. Disponible en: http://www.bvs .sld.cu /revistas /ali/vol14_2_00/ali03200.htm visitado 9 de Marzo de 2006
38. ABC of preterm birth: Epidemiology of preterm birth. Disponible en: http://www. studentbmj.com /issues/05/ 04/education/146.php. Consultado el 15 de diciembre de 2005.
39. Morgues M, Henríquez MT, Tohá D, Vernal P,Pittaluga E, Vega S, et al. Sobrevida del niño menor de 1500g en Chile. REV CHIL OBSTET GINECOL 2002;67(2): 100-5.
40. Águila A, Muñoz H. Tendencias de la natalidad, mortalidad general, infantil y neonatal en Chile desde 1850 a la fecha. Rev Méd Chil 1997;125:1236-45.
41. Águila A. Recién nacido de muy bajo peso de nacimiento, situación actual. REV CHIL OBSTET GINECOL 2000; 65:138-45.
42. Hubner ME, Ramírez R. Sobrevida, viabilidad y pronóstico del prematuro extremo. Rev Méd Chile 2002;130(8):931-8.
43. GRUPO COLABORATIVO NEOCOSUR. Very-lowbirh- weight infant outcomes in 11 South American NICUs. J Perinatol 2002;22(1):2-7.
44. Keith L, Oleszczuk JJ. Iatrogenic multiple birth, multiple pregnancy, and assisted reproductive technologies. Int J Gynecol Obstet. 1999;64:11-25.
45. .Cusick W, Gleicher N. Multiple conceptions, implantation and prematurity. Assisted Reprod Rev. 1999;5:246-250.
46. Bryan E. Twins and Higher Multiple Births: A Guide to Their Nature and Nurture. London, England: Edward Arnold; 1992.
47. Monthly Vital Statistics Report. 1998;45:1-15.
48. Luke B, Bigger HR, Leurgans S, Sietsema D. The cost of prematurity: a case-control study of twins vs singletons. Am J Pub Health. 1996;86(6):809-814.
49. Derom R, Orlebeke E, Erikson A, Thiery M. The epidemiology of multiple births in Europe. In: Keith LG, Papiernik E, Keith DM, Luke B, eds. Multiple Pregnancy: Epidemiology, Gestation & Perinatal Outcome. London, England: Parthenon Publishing; 2005:145-162.
50. Westergaard T, Wohlfahrt J, Aaby P, Melbye M. Population based study of rates of multiple pregnancies in Denmark, 1980-94. BMJ. 2007;314:775-779.
51. Imaizumi Y, Nonaka K. The twinning rates by zygosity in Japan, 1975-1994. Acta Genet Med Gemellol. 1997;46:9-22.
52. Imaizumi Y, Nonaka K. Rising trizygotic triplet rates in Japan, 1975-1994. Acta Genet Med Gemellol. 1997;46:87-98.
53. Gleicher N, Campbell DP, Chan CL, et al. The desire for multiple births in couples with infertility problems contradicts present practice patterns. Hum Reprod. 2005;10:1079-1084.
54. Verhoeven H. Presented at the 7th Winter School on Perinatal Medicine; February 18, 1999; Zermatt, Switzerland.
55. Ikeda S, Hasegawa A, Nagai R. Peripartum cardiomyopathy of multiple pregnancy. Ryoikibetsu Shokogun Shirizu. 1996;14:170-173.
56. Garel M, Blondel B, Kaminski M. Multiple births in couples with infertility problems. Hum Reprod. 1995;10:2748. Letter.
57. Robin M, Kheroua H, Casati I. Effects of early mother-twin relationships from birth to age 3, on twin bonding. Acta Genet Med Gemellol. 2002;41:143-148.
58. Robin M, Josse D, Tourrette C. Forms of family reorganization following the birth of twins. Acta Genet Med Gemellol. 1991;40:53-61.
59. ACOG Committee on Ethics. Nonselective embryo reduction: ethical guidance for the obstetrician-gynecologist; April 1999. Technical bulletin 215.
60. Chervenak FA, McCullough LB. Ethical aspects of iatrogenic multiples. In: Blickstein I, Keith LG, eds. Iatrogenic Multiple Pregnancy Clinical Implications. London, England: Parthenon Publishing; 1999. In press.
61. Gleicher N. Strategies to improve insurance coverage for infertility services. Fertil Steril. 1998;70:1006-1008.
62. Templeton A, Morris JK. Reducing the risk of multiple birth by transfer of two embryos after in vitro fertilization. N Engl J Med. 1998;339:573-577.
63. Veeck LL, Davis OK, Rosenwaks Z. How to avoid multiple pregnancy during artificial reproductive treatment. In: Blickstein I, Keith LG, eds. Iatrogenic Multiple Pregnancy Clinical Implications. London, England: Parthenon Publishing; 1999. In press.
64. Rynders PM, Jansen CAM. The predictive value of day 3 embryo morphology for blastocyst formation and implantation rate at day 5 in IVF. Hum Reprod. 1996;1:86. Abstract.
65. Verhoeven H. Can we prevent higher order multiples? Presented at VII Winter School on Perinatal Medicine of the Polish Society of Perinatal Medicine, Zermatt, Switzerland, Feb 28, 1999.
66. Evans MI, May M, Drugan A, et al. Selective termination: clinical experience and residual risks. Am J Obstet Gynecol. 1990;162:1568-1572.
67. Bach i Vallmajor. Cribado de las malformaciones fetales. Estrategia, en:Cabero Roura, L. (coord.). Cribado en Medicina Materno-fetal, Barcelona, Ediciones Mayo, 2000, 67-78.
68. Bricker L, Neilson JP. Routine ultrasound in late pregnancy (after 24 weeks gestation) (Cochrane Review), in: The Cochrane Library, 3, 2001. Oxford: Update Software.
69. CDC. Prevention of Perinatal Group B Streptococcal Disease: A Public Health Perspective, MMWR May 31, 1996 / 45 (RR-7); 1-24.
70. CDC. Prevention and Control of Influenza. Recomendations of the Advisory Committee on Immunization Practices (ACIP), MMWR Abril 20, 2001 / 50 (RR04); 1-46.
71. Comité Asesor de Vacunas (CAV). Asociación Española de Pediatría. Manual de Vacunas en Pediatría, CAV, 2001.
72. Crowther CA. Anti-D administration in pregnancy for preventing Rhesus alloimmunisation (Cochrane Review), in: The Cochrane Library, 3, 2001. Oxford: Update Software.
73. Generalitat Valenciana. Plan de Salud de la Comunidad Valenciana (2001-2004). Conselleria de Sanitat, 2001.
74. Generalitat Valenciana. Pla per la igualtat d’oportunitats entre hòmens i dones (2001-2004). Conselleria de Benestar Social, 2001.
75. Gilbert RE, et al. Screening for Down’s syndrome: effects, safety, andcost effectiveness of first and second trimester strategies. BMJ, 2001, 323:423.
76. Grupo Español de Diabetes y Embarazo (G.E.D.E.). Diabetes Mellitus y Embarazo. “Guía Asistencial”, Madrid, 2ª edición, 2000.71
77. Lumley J, Watson M, Bower C. Periconceptional supplementation with folate and /or multivitamins for preventing neural tube defects (Cochrane Review), in: The Cochrane Library, 3, 2001. Oxford: Update Software.
78. Mahomed K. Iron and folate supplementation in pregnancy (Cochrane Review), in: The Cochrane Library, 3, 2001. Oxford: Update Software.
79. Mahomed K. Iron supplementation in pregnancy (Cochrane Review), in: The Cochrane Library, 3, 2001. Oxford: Update Software.
80. Neilson JP. Ultrasound for fetal assesment in early pregnancy (Cochrane Review), in: The Cochrane Library, 3, 2001. Oxford: Update Software.
81. S.E.G.O. Documentos de consenso, 2000.
82. S.E.G.O.; S.E.N. Recomendaciones para la prevención de la infección perinatal por estreptococo del grupo B. Documento de Consenso,
83. Prog.Obstet.Ginecol. 1998; 41:431-435.
84. Smaill F. Intrapartum antibiotics for Group B streptococcal colonisation (Cochrane Review), in: The Cochrane Library, 3, 2001. Oxford: Update Software.
85. U.S. Preventive Services Task Force. Guía de Medicina Clínica Preventiva, Barcelona, Medical Trends, 1998.
86. Wald NJ, Watt HC, Hackshaw AK. Integrated screening for Down’s syndrome based on tests performed during the first and second trimesters. The New England Journal of Medicine, 1999, 341, 7: 461- 467.
87. Walkinshaw SA. Dietary regulation for “gestational diabetes” (Cochrane Review), in: The Cochrane Library, 3, 2001. Oxford: Update Software.
88. International Committee for the Classification of Retinopathy of Prematurity. The International Classification of Retinopathy of Prematurity revisited. Arch Ophthalmol 2005; 123: 991-999.
89. Cryotherapy for Retinopathy of Prematurity Cooperative Group. Multicenter Trial of Cryotherapy for Retinopathy of Prematurity: ophthalmological outcomes at 10 years. Arch Ophthalmol 2001; 119: 1110-1118.
90. . Early Treatment For Retinopathy Of Prematurity Cooperative Group. Revised indications for the treatment of retinopathy of prematurity: results of the early treatment for retinopathy of prematurity randomized trial. Arch Ophthalmol 2003; 121: 1684-1694.
91. Hellstrom A, Perruzzi C, Ju M, Engstrom E, Hard AL, Lui JL, et al. Low IGF-I suppresses VEGF-survival signalling in retinal endothelial cells: direct correlation with clinical retinopathy of prematurity. Proc Natl Acad Sci USA 2001;98: 5804-5808.
92. . Hellstrom A, Engstrom E, Hard AL; Albertsson-Wikland K, Carlsson B, Niklasson A, et al. Postnatal serum insulinlike growth factor I deficiency is associated with retinopathy of prematurity and other complications of premature birth. Pediatrics 2003; 112: 1016-1020.