2. Zaganjor I, Sekkarie A, Tsang BL, Williams J, Razzaghi H, Mulinare J, et al. Describing the prevalence of neural tube defects worldwide: a systematic literature review. PLoS One. 2016; 11(4):e0151586.
https://doi.org/10.1371/journal.pone.0151586.
Article
3. Kong YM, Xiang K, Luo Y, Zhu BS. Regional difference in the incidence of the morbidity of neural tube defects in China and intervention strategies. Chin J Pract Gynecol Obstet. 2015; 31(12):1110–1116.
4. Blount JP, George TM, Koueik J, Iskandar BJ. Concepts in the neurosurgical care of patients with spinal neural tube defects: an embryologic approach. Birth Defects Res. 2019; 111(19):1564–1576.
https://doi.org/10.1002/bdr2.1588.
Article
5. Chitayat D, Matsui D, Amitai Y, Kennedy D, Vohra S, Rieder M, et al. Folic acid supplementation for pregnant women and those planning pregnancy: 2015 update. J Clin Pharmacol. 2016; 56(2):170–175.
https://doi.org/10.1002/jcph.616.
Article
6. Yang S, Liu Y, Dang W, Zhang X. Statue of folic acid intake of the urban pregnant women of Shanxi province and its influence factors. Chin J Fam Plann. 2018; 26(11):1019–1023.
7. Ren XF, Zhang L. [Analysis of 1635 cases of women taking folic acid in early pregnancy in areas with high birth defects in Shaanxi Province and its influencing factors]. Chin J Reprod Heatlth. 2017; 28(3):253–255. In Chinese.
8. Yang S, Jin YS, Zhang XJ. [Current status of folic acid knowledge, beliefs, and practices among rural pregnant women in Shanxi Province and its influencing factors]. Chin J Reprod Health. 2018; 29(3):266–270. In Chinese.
10. Yamamoto S, Wada Y. Awareness, use and information sources of folic acid supplementation to prevent neural tube defects in pregnant Japanese women. Public Health Nutr. 2018; 21(4):732–739.
https://doi.org/10.1017/S1368980017003172.
Article
11. Nilsen RM, Leoncini E, Gastaldi P, Allegri V, Agostino R, Faravelli F, et al. Prevalence and determinants of preconception folic acid use: an Italian multicenter survey. Ital J Pediatr. 2016; 42(1):65.
https://doi.org/10.1186/s13052-016-0278-z.
Article
12. Kim J, Yon M, Kim CI, Lee Y, Moon GI, Hong J, et al. Preconceptional use of folic acid and knowledge about folic acid among low-income pregnant women in Korea. Nutr Res Pract. 2017; 11(3):240–246.
https://doi.org/10.4162/nrp.2017.11.3.240.
Article
13. Cawley S, Mullaney L, McKeating A, Farren M, McCartney D, Turner MJ. An analysis of folic acid supplementation in women presenting for antenatal care. J Public Health (Oxf). 2016; 38(1):122–129.
https://doi.org/10.1093/pubmed/fdv019.
Article
14. Bixenstine PJ, Cheng TL, Cheng D, Connor KA, Mistry KB. Association between preconception counseling and folic acid supplementation before pregnancy and reasons for non-use. Matern Child Health J. 2015; 19(9):1974–1984.
https://doi.org/10.1007/s10995-015-1705-2.
Article
15. Maraschini A, D'Aloja P, Lega I, Buoncristiano M, Kirchmayer U, Ventura M, et al. Do Italian pregnant women use periconceptional folate supplementation? Ann Ist Super Sanita. 2017; 53(2):118–124.
https://doi.org/10.4415/ANN_17_02_07.
Article
16. Guo HJ, Wang XG, Guo Y. [Analysis on knowledge and behavior of folic acid supplementation among 431 pregnant women]. Matern Child Health Care China. 2014; 29(31):5052–5054. In Chinese.
17. Cawley S, Mullaney L, McKeating A, Farren M, McCartney D, Turner MJ. Knowledge about folic acid supplementation in women presenting for antenatal care. Eur J Clin Nutr. 2016; 70(11):1285–1290.
https://doi.org/10.1038/ejcn.2016.104.
Article
19. Hao N, Xia W, Tang Y, Wu M, Jiang H, Lin X, et al. Periconceptional folic acid supplementation among pregnant women with epilepsy in a developing country: a retroprospective survey in China. Epilepsy Behav. 2015; 44:27–34.
https://doi.org/10.1016/j.yebeh.2014.12.026.
Article
21. Obara T, Nishigori H, Nishigori T, Metoki H, Ishikuro M, Tatsuta N, et al. Prevalence and determinants of inadequate use of folic acid supplementation in Japanese pregnant women: the Japan Environment and Children's Study (JECS). J Matern Fetal Neonatal Med. 2017; 30(5):588–593.
https://doi.org/10.1080/14767058.2016.1179273.
Article
22. Goshu YA, Liyeh TM, Ayele AS, Zeleke LB, Kassie YT. Women’s awareness and associated factors on preconception folic acid supplementation in Adet, Northwestern Ethiopia, 2016: implication of reproductive health. J Nutr Metab. 2018; 2018:4936080.
https://doi.org/10.1155/2018/4936080.
Article
23. Li D, Huang L, Yang W, Qi C, Shang L, Xin J, et al. Knowledge, attitude and practice level of women at the periconceptional period: a cross-sectional study in Shaanxi China. BMC Pregnancy Childbirth. 2019; 19(1):326.
https://doi.org/10.1186/s12884-019-2481-6.
Article
25. Ji GP. [Effect evaluation of folic acid supplementation program for prevention of neural tube defects in Anhui Province]. Matern Child Health Care China. 2017; 32:2821–2823. In Chinese.
26. Yan J, Zheng YZ, Cao LJ, Liu YY, Li W, Huang GW. Periconceptional folic acid supplementation in Chinese women: a cross-sectional study. Biomed Environ Sci. 2017; 30(10):737–748.
https://doi.org/10.3967/bes2017.099.
Article
27. McNulty B, Pentieva K, Marshall B, Ward M, Molloy AM, Scott JM, et al. Women's compliance with current folic acid recommendations and achievement of optimal vitamin status for preventing neural tube defects. Hum Reprod. 2011; 26(6):1530–1536.
https://doi.org/10.1093/humrep/der078.
Article
28. Chinese Society of Obstetrics and Gynecology; Chinese Medical Association. Guideline for prenatal care and antenatal care (edition 1). Chin J Obstet Gynecol. 2011; 46:150–153.
29. Toivonen KI, Lacroix E, Flynn M, Ronksley PE, Oinonen KA, Metcalfe A, et al. Folic acid supplementation during the preconception period: a systematic review and meta-analysis. Prev Med. 2018; 114:1–17.
https://doi.org/10.1016/j.ypmed.2018.05.023.
Article
30. Wu T, Dang S. Effect of folic acid supplementation-related cognition on folic acid intake among childbearing women in Shaanxi province: a log-binomial regression model analysis. Chin J Public Health. 2019; 35(9):1161–1165.
https://doi.org/10.11847/zgggws1119753.
Article
31. Robbins JM, Cleves MA, Collins HB, Andrews N, Smith LN, Hobbs CA. Randomized trial of a physician-based intervention to increase the use of folic acid supplements among women. Am J Obstet Gynecol. 2005; 192(4):1126–1132.
https://doi.org/10.1016/j.ajog.2004.10.620.
Article