Nhoncanse GC, Germano CM, Avó LR, Melo DG. Maternal and perinatal aspects of birth defects: a case-control study. Revista Paulista de Pediatria. 2014;32(1):24–31.
Ahmed W, Dey D, Farid R. Prevalence and pattern of congenital anomalies and its outcome at Chattagram Maa-O-Shishu general hospital. Chattagram Maa-O-Shishu Hospital Med College J. 2017;16(1):22–5.
Li Z, Ren A, Zhang L, Guo Z, Li Z. A population-based case-control study of risk factors for neural tube defects in four high-prevalence areas of Shanxi province, China. Paediatr Perinat Epidemiol. 2006;20(1):43–53.
Agha MM, Williams JI, Marrett L, To T, Dodds L. Determinants of survival in children with congenital abnormalities: a long-term population-based cohort study. Birth Defects Res A: Clin Mol Teratol. 2006;76(1):46–54.
Waller DK, Shaw GM, Rasmussen SA, Hobbs CA, Canfield MA, Siega-Riz AM, et al. Prepregnancy obesity as a risk factor for structural birth defects. Arch Pediatr Adolesc Med. 2007;161(8):745–50.
Persson M, Cnattingius S, Villamor E, Söderling J, Pasternak B, Stephansson O, Neovius M. Risk of major congenital malformations in relation to maternal overweight and obesity severity: cohort study of 1.2 million singletons. BMJ. 2017;357:j2563.
Francine R, Pascale S, Aline H. Congenital anomalies: prevalence and risk factors. Universal J Public Health. 2014;2(2):58–63.
Ali WA, Balaha MH, Al Moghannum MS, Hashim I. Risk factors and birth prevalence of birth defects and inborn errors of metabolism in Al Ahsa, Saudi Arabia. Pan Afr Med J. 2011;8(14):1–7. https://doi.org/10.11604/pamj.2011.8.14.483.
Lorente C, Cordier S, Goujard J, Aymé S, Bianchi F, Calzolari E, De Walle HE, Knill-Jones R. Tobacco and alcohol use during pregnancy and risk of oral clefts. Occupational exposure and congenital malformation working group. Am J Public Health. 2000;90(3):415.
Dolk H, Loane M, Garne E. The prevalence of congenital anomalies in Europe. Adv Exp Med Biol. 2010;686:349–64.
World Health Organization. Sixty-Third World Health Assembly. Provisional agenda item 11.7. 2010.
Mahela S, Talukdar B. Prevalence of congenital abnormalities on routine ultrasound scan of second and third trimester pregnancy. Int J Reproduction, Contraception, Obstetrics Gynecol. 2016;5(1):183. https://doi.org/10.18203/2320-1770.ijrcog20151621.
Taye M, Afework M, Fantaye W, Diro E, Worku A. Factors associated with congenital anomalies in Addis Ababa and the Amhara region, Ethiopia: a case-control study. BMC Pediatr. 2018;18(1):1–11.
Ajao AE, Adeoye IA. Prevalence, risk factors and outcome of congenital anomalies among neonatal admissions in OGBOMOSO. Nigeria BMC Pediatrics. 2019;19(1):88.
Costa CM, Gama SG, Leal MD. Congenital malformations in Rio de Janeiro, Brazil: prevalence and associated factors. Cadernos de saude publica. 2006;22:2423–31.
Sarkar S, Patra C, Dasgupta MK, Nayek K, Karmakar PR. Prevalence of congenital anomalies in neonates and associated risk factors in a tertiary care hospital in eastern India. J Clin Neonatol. 2013;2(3):131.
Ameen SK, Alalaf SK, Shabila NP. Pattern of congenital anomalies at birth and their correlations with maternal characteristics in the maternity teaching hospital, Erbil city, Iraq. BMC Pregnancy Childbirth. 2018;18(1):501.
Taye M, Afework M, Fantaye W, Diro E, Worku A. Congenital anomalies prevalence in Addis Ababa and the Amhara region, Ethiopia: a descriptive cross-sectional study. BMC Pediatr. 2019;19(1):234.
Molla Taye MA, Fantaye W, Diro E, Worku A. Magnitude of birth defects in central and Northwest Ethiopia from 2010–2014: a descriptive retrospective study. PLoS One. 2016;11(10):1–12. https://doi.org/10.1371/journal.pone.0161998.
Khattak S, Guiti K, McMartin K, Barrera M, Kennedy D, Koren G. Pregnancy outcome following gestational exposure to organic solvents: a prospective controlled study. Jama. 1999;281(12):1106–9.
Mashuda F, Zuechner A, Chalya PL, Kidenya BR, Manyama M. Pattern and factors associated with congenital anomalies among young infants admitted at Bugando medical Centre, Mwanza, Tanzania. BMC Res Notes. 2014;7(1):195.
Yard E, Bayleyegn T, Abebe A, Mekonnen A, Murphy M, Caldwell KL, Luce R, Hunt DR, Tesfaye K, Abate M, Assefa T. Metals exposures of residents living near the Akaki River in Addis Ababa, Ethiopia: a cross-sectional study. J Environ Public Health. 2015. 935297. https://www.cdc.gov/nceh/hsb/cwh/technical_ethiopia.htm.
Taboo ZA. Prevalence and risk factors for congenital anomalies in Mosul city. Iraqi Academic Scientific Journal. 2012;11(4):458–70.
Singh A, Sinha S. Risk factors of congenital malformations in North India: a case-control study. J Postgrad Med Education Res. 2016;50(1):22–7.
Bianchi F, Cianciulli D, Pierini A, Costantini AS. Congenital malformations and maternal occupation: a registry based case-control study. Occup Environ Med. 1997;54(4):223–8.
Et. Kelsey. StatCalc - Calculating a Sample Size with Epi-Info. 2012. p. 1–17.
Sav A, McMillan SS, Kelly F, King MA, Whitty JA, Kendall E, Wheeler AJ. The ideal healthcare: priorities of people with chronic conditions and their carers. BMC Health Serv Res. 2015;15(1):551.
Gaspari L, Paris F, Jandel C, Kalfa N, Orsini M, Daurès JP, Sultan C. Prenatal environmental risk factors for genital malformations in a population of 1442 French male newborns: a nested case-control study. Hum Reprod. 2011;26(11):3155–62.
Badawi N, Kurinczuk JJ, Keogh JM, Alessandri LM, O'Sullivan F, Burton PR, Pemberton PJ, Stanley FJ. Intrapartum risk factors for newborn encephalopathy: the Western Australian case-control study. BMJ. 1998;317(7172):1554–8.
Eke CB, Uche EO, Chinawa JM, Obi IE, Obu HA, Ibekwe RC. Epidemiology of congenital anomalies of the central nervous system in children in Enugu, Nigeria: a retrospective study. Ann Afr Med. 2016;15(3):126.
Abdel-Aleem MA, Al-Aghbari A, Mustafa M, Nasr AA, Assad A. Khat chewing during pregnancy: an insight on an ancient problem impact of chewing khat on maternal and fetal outcome among Yemeni pregnant women. J Gynecol Neonatal Biology. 2015;1(2):28–31.
Seyoum G, Adane F. Prevalence and associated factors of birth defects among newborns at referral hospitals in Northwest Ethiopia. Ethiopian J Health Dev. 2018;32(3):1–7.
Forray A, Foster D. Substance use in the perinatal period. Current psychiatry reports. 2015;17(11):91.
Teklie H, Gonfa G, Getachew T, Defar A, Bekele A, Bekele A, Gelibo T, Amenu K, Taddele T, Taye G, Getinet M. Prevalence of Khat chewing and associated factors in Ethiopia: findings from the 2015 national non-communicable diseases STEPS survey. Ethiop J Health Dev. 2017;31(1):320–30.
Goh YI, Koren G. Folic acid in pregnancy and fetal outcomes. J Obstet Gynaecol. 2008;28(1):3–13.