References
- Zhao QM, Liu F, Wu L, et al. Prevalence of congenital heart disease at live birth in China. J Pediatr. 2019;204:53–58.
- Liu Y, Chen S, Zuhlke L, et al. Global birth prevalence of congenital heart defects 1970–2017: updated systematic review and meta-analysis of 260 studies. Int J Epidemiol. 2019;48(2):455–463.
- Singh S, Sedgh G, Hussain R. Unintended pregnancy: worldwide levels, trends, and outcomes. Stud Fam Plann. 2010;41(4):241–250.
- Finer LB, Zolna MR. Declines in unintended pregnancy in the United States, 2008–2011. N Engl J Med. 2016;374(9):843–852.
- Rocca CH, Wilson MR, Jeon M, et al. Stability of retrospective pregnancy intention reporting among women with unwanted pregnancies in the United States. Matern Child Health J. 2019;23(11):1547–1555.
- Brown G, Parham DF, Harris L, et al. A survey of knowledge and practices regarding prevention of unintended pregnancies. J Physician Assist Educ. 2015;26(1):34–39.
- Flower A, Shawe J, Stephenson J, et al. Pregnancy planning, smoking behaviour during pregnancy, and neonatal outcome: UK Millennium Cohort Study. BMC Pregnancy Childbirth. 2013;13(1):238.
- Singh A, Singh A, Mahapatra B. The consequences of unintended pregnancy for maternal and child health in rural India: evidence from prospective data. Matern Child Health J. 2013;17(3):493–500.
- Lindberg L, Maddow-Zimet I, Kost K, et al. Pregnancy intentions and maternal and child health: an analysis of longitudinal data in Oklahoma. Matern Child Health J. 2015;19(5):1087–1096.
- Mastroiacovo P, Nilsen RM, Leoncini E, et al. Prevalence of maternal preconception risk factors: an Italian multicenter survey. Ital J Pediatr. 2014;40:91.
- Toivonen KI, Lacroix E, Flynn M, et al. Folic acid supplementation during the preconception period: a systematic review and meta-analysis. Prev Med. 2018;114:1–17.
- Dolin CD, Deierlein AL, Evans MI. Folic acid supplementation to prevent recurrent neural tube defects: 4 milligrams is too much. Fetal Diagn Ther. 2018;44(3):161–165.
- Roberts SC, Wilsnack SC, Foster DG, et al. Alcohol use before and during unwanted pregnancy. Alcohol Clin Exp Res. 2014;38(11):2844–2852.
- Zhu Y, Romitti PA, Caspers CK, et al. Maternal periconceptional alcohol consumption and congenital heart defects. Birth Defects Res A Clin Mol Teratol. 2015;103(7):617–629.
- Shah PS, Balkhair T, Ohlsson A, et al. Intention to become pregnant and low birth weight and preterm birth: a systematic review. Matern Child Health J. 2011;15(2):205–216.
- Jerves T, Beaton A, Kruszka P. The genetic workup for structural congenital heart disease. Am J Med Genet C Semin Med Genet. 2020;184(1):178–186.
- Kalisch-Smith JI, Ved N, Sparrow DB. Environmental risk factors for congenital heart disease. Cold Spring Harb Perspect Biol. 2020;12(3):a037234.
- Moreau J, Kesteven S, Martin E, et al. Gene-environment interaction impacts on heart development and embryo survival. Development. 2019;146(4):dev172957.
- Schulkey CE, Regmi SD, Magnan RA, et al. The maternal-age-associated risk of congenital heart disease is modifiable. Nature. 2015;520(7546):230–233.
- Zhao L, Chen L, Yang T, et al. Parental smoking and the risk of congenital heart defects in offspring: an updated meta-analysis of observational studies. Eur J Prev Cardiol. 2019;27(12):1284–1293.
- Li X, Li S, Mu D, et al. The association between periconceptional folic acid supplementation and congenital heart defects: a case-control study in China. Prev Med. 2013;56(6):385–389.
- Zhu Y, Chen Y, Feng Y, et al. Association between maternal body mass index and congenital heart defects in infants: a meta-analysis. Congenit Heart Dis. 2018;13(2):271–281.
- Meisgen S, Tingstrom J, Skog AA, et al. Environmental and lifestyle factors influencing risk of congenital heart block during pregnancy in anti-Ro/SSA-positive women. RMD Open. 2017;3(2):e520.
- Liu Z, He C, Chen M, et al. The effects of lead and aluminum exposure on congenital heart disease and the mechanism of oxidative stress. Reprod Toxicol. 2018;81:93–98.
- Nicoll R. Environmental contaminants and congenital heart defects: a re-evaluation of the evidence. Int J Environ Res Public Health. 2018;15(10):2096.
- Erfani A, Hosseini H, Nojomi M. Unintended pregnancies in Hamedan, Iran: levels and determinants. Women Health. 2019;59(3):318–333.
- Khoramrooz M, Rezapour A, Shirinbakhsh S, et al. Investigating changes in unintended pregnancies before and after the changes in the family planning policies in Iran: a multivariate decomposition analysis. Med J Islam Repub Iran. 2019;33:134
- Solanke BL, Kupoluyi JA, Akinyemi JO, et al. Do community characteristics influence unintended pregnancies in Kenya? Malawi Med J. 2019;31(1):56–64.