References
- Braude, P.. (2006). One Child at a Time: Reducing Multiple Births after IVF Report of the Expert Group on Multiple Births after IVF http://www.hfea.gov.uk/docs/MBSET_report.pdf
- Cutting, R., Morroll, D., Roberts, S. A., Pickering, S., & Rutherford, A.; BFS and ACE. (2008). Elective single embryo transfer: guidelines for practice British Fertility Society and Association of Clinical Embryologists. Human Fertility (Cambridge, England), 11, 131–146.
- Hamilton, M. (2007). Multiple births in the United Kingdom–a consensus statement. Human Fertility (Cambridge, England), 10, 71–74.
- HFEA. (2011). Improving Outcomes for Fertility Patients: Multiple Births. A Statistical Report. http://www.hfea.gov.uk/docs/2010-05-18_-_Multiple_Births_Publication_2011_-_Rationalising_Register_Data_-_FINAL_1.pdf
- HFEA Chairs letter 01(10). (2010). Multiple Births Policy. Human Fertilisation and Embryo Authority. http://www.hfea.gov.uk/5750.html
- Källén, B., Finnström, O., Lindam, A., Nilsson, E., Nygren, K. G., & Otterblad Olausson, P. (2010). Trends in delivery and neonatal outcome after in vitro fertilization in Sweden: data for 25 years. Human reproduction (Oxford, England), 25, 1026–1034.
- Lukassen, H. G., Schönbeck, Y., Adang, E. M., Braat, D. D., Zielhuis, G. A., & Kremer, J. A. (2004). Cost analysis of singleton versus twin pregnancies after in vitro fertilization. Fertility and Sterility, 81, 1240–1246.