เอกสารอ้างอิง
- Periconceptional folic acid supplementation to prevent neural tube defects. WHO. 2007.
- De‐Regil LM, Peña‐Rosas JP, Fernández‐Gaxiola AC, Rayco‐Solon P. Effects and safety of periconceptional oral folate supplementation for preventing birth defects. Cochrane Database of Systematic Reviews 2015, Issue 12. Art. No.: CD007950.
- Neural tube defect (NTD). OB GYN CMU.