1. Clinical Laboratory Improvement Amendments of 1988: Final rule, 57 Federal register 7002, 1992.
2. European Tissue Directive, Official Journal of the European Union, 2004, 2004/23/EC.
3. European Technical Directive, Official Journal of the European Union, 2006, 2006/17/EC, L294/32.
4. Australian and New Zealand, ReproductiveTechnology Accreditation Committee (RTAC) Code of Practice, produced in 2005, 18–20. http://www.fsa.au.com.
5. Directions Given Under The Human Fertilization And Embryology Act 1990. Bringing into force the Code of Practice (seventh edition) D.2007/5: Section 26(5).