References
- Koebnick C, Heins UA, Dagnelie PC, Wickramasinghe SN, Ratnayaka ID, Hothorn T et al. 2002. Longitudinal concentrations of vitamin B(12) and vitamin B(12)-binding proteins during uncomplicated pregnancy. Clinical Chemistry 48:928–933.
- Milman N, Bergholt T, Byg KE, Eriksen L, Hvas AM. 2007. Reference intervals for haematological variables during normal pregnancy and postpartum in 434 healthy Danish women. European Journal of Haematology 79:39–46.
- Milman N, Byg KE, Bergholt T, Eriksen L, Hvas AM. 2006. Cobalamin status during normal pregnancy and postpartum: a longitudinal study comprising 406 Danish women. European Journal of Haematology 76:521–525.
- NICE. 2008. Antenatal care: Routine care of the healthy pregnant woman. LondonNational Institute of Clinical Excellence
- RCOG. 2007. Blood transfusion in obstetrics. Green Top Guideline No. 47. LondonRoyal College of Obstetricians and Gynaecologists
- Wilson RD. 2003. The use of folic acid for the prevention of neural tube defects and other congenital anomalies. Journal of Obstetrics and Gynaecology, Canada 25:959–973.