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2. 9. Human Fertilisation and Embryology Act 1990, amended 2008. http://webarchive.nationalarchives.gov.uk/20130107105354/http://www.dh.gov.uk/prod_consum_dh/groups/dh_digitalassets/@dh/@en/documents/digitalasset/dh_080206.pdf.
3. Obstetric outcome in 232 ovum donation pregnancies;Abdalla;British Journal of Obstetrics and Gynaecology,1998
4. 7. H Letur-Koenirsch et al. O-163 Pregnancies issued from egg donation are associated to a higher risk of hypertensive pathologies then control ART pregnancies. Results of a large comparative cohort study. Abstracts. ESHRE 2014.
5. 6. SART data paper for frozen OD eggs in USA.