1. MacDonald, H., & The Committee on Fetus, Newborn. (2002). Perinatal care at the threshold of viability. Pediatrics, 110(5), 1024–1027.
2. Hoyert, D. L., Barfield, W., & Martin, J. A. (2004). Recent trends in fetal mortality, United States. WHO Family of International Classification Network Meeting, Reykjavik, Iceland, October 24–30, 2004.
3. Behrman, R. E., & Stith, B. A. (Eds.). (2008). Preterm birth: Causes, consequences, and prevention. National Academy of Sciences 2008. Downloaded July 14, 2008, from http://books.nap.edu/catalog/11622.html .
4. Prematurity Research Expansion and Education for Mothers who deliver Infants Early Act, S.707, 109th Congress of the Unites States of America, Second Session, January 3, 2006.
5. Nuffield Council on Bioethics. (2006). Critical care decisions in fetal and neonatal medicine: Ethical issues. London, England: Nuffield Council on Bioethics.