Notes
2Källén B, Finnström O, Lindam A, Nilsson E, Nygren KG, and Otterblad Olausson P. Trends in delivery and neonatal outcome after in vitro fertilization in Sweden: data for 25 years. Hum Reprod. 2010 Apr;25(4):1026-34. Epub2010 Feb 5
3De Mouzon J, Goossens V, Bhattacharya S, Castilla JA, Ferraretti AP, Korsak V, Kupka M, Nygren KG, Nyboe Andersen A; European IVF-monitoring (EIM) Consortium, for the European Society of Human Reproduction and Embryology (ESHRE). Assisted reproductive technology in Europe, 2006: results generated from European registers by ESHRE. Hum Reprod. 2010 Aug;25(8):1851-62. Epub 2010 Jun 22.
5Lukassen H, Schönbeck Y, Adang E, Braat D, Zielhuis G, and Kremer J. Cost analysis of singleton versus twin pregnancies after in vitro fertilization. Fertil Steril. 2004 May;81(5):1240-6.
6British Association of Perinatal Medicine, Service standards for hospitals providing neonatal care (3rd edition), August 2010