References
- Harris RD, Couto C, Karpovsky BS, et al. The chorionic bump: a first-trimester pregnancy sonographic finding associated with a guarded prognosis. J Ultrasound Med. 2006;25(6):757–763.
- Baalmann CG, Galgano SJ, Pietryga JA, et al. A case of a chorionic bump: new sonographic-histopathologic findings with review of the literature. J Ultrasound Med. 2017;36(9):1968–1970.
- Sana Y, Appiah A, Davison A, et al. Clinical significance of first-trimester chorionic bumps: a matched case-control study. Ultrasound Obstet Gynecol. 2013;42(5):585–589.
- Younesi L, Shahnazari R. Chorionic bump in first-trimester sonography. J Med Ultrasound. 2017; 25(4):221–226.
- Sepulveda W. Chorionic bump at 11 to 13 weeks' gestation: prevalence and clinical significance. Prenat Diagn. 2019; 39(6):471–476.
- Henderson LK, Craig JC, Willis NS, et al. How to write a cochrane systematic review. Nephrology (Carlton). 2010;15(6):617–624.
- NHS Centre for Reviews and Dissemination. Systematic reviews: CRD’s guidance for undertaking reviews in health care. University of York: York (UK), 2009. https://www.york.ac.uk/media/crd/Systematic_Reviews.pdf.
- Welch V, Petticrew M, Petkovic J, et al. Extending the PRISMA statement to equity-focused systematic reviews (PRISMA-E 2012): explanation and elaboration. J Clin Epidemiol. 2016;70:68–89.
- Stewart LA, Clarke M, Rovers M, et al. Preferred reporting items for systematic review and Meta-Analyses of individual participant data: the PRISMA-IPD statement. Jama. 2015;313(16):1657–1665.
- Moher D, Liberati A, Tetzlaff J, et al. Preferred reporting items for systematic reviews and meta-analyses: the PRISMA statement. Ann Intern Med. 2009;151(4):264–269.
- Zorzela L, Loke YK, Ioannidis JP, et al. PRISMA harms checklist: improving harms reporting in systematic reviews. BMJ. 2016;352:i157.
- Stroup DF, Berlin JA, Morton SC, et al. Meta-analysis of observational studies in epidemiology: a proposal for reporting. Meta-analysis of observational studies in epidemiology (MOOSE) group. Jama. 2000;283(15):2008–2012.
- Wells GA, Shea B, O'Connell D, et al. The Newcastle-Ottawa Scale (NOS) for assessing the quality of nonrandomised studies in meta-analyses. Ottawa: Ottawa Hospital Research Institute. http://www.ohri.ca/programs/clinical_epidemiology/oxford.asp.
- Higgins JP, Thompson SG, Deeks JJ, et al. Measuring inconsistency in meta-analyses. BMJ. 2003;327(7414):557–560.
- Egger M, Smith GD, Phillips AN. Meta-analysis: principles and procedures. BMJ. 1997;315(7121):1533–1537.
- Wax JR, Cartin A, Litton C, et al. First-trimester chorionic bump-association with fetal aneuploidy in a high-risk population. J Clin Ultrasound. 2017;45(1):3–7.
- Silva MC, Sepúlveda-Martínez A, Guíñez R, et al. Chorionic bump: an early ultrasound marker for adverse obstetric outcome. Gynecol Obstet Invest. 2019; 84(3):237–241.
- Lu Y, Wu Y, Huang F, et al. A single-center retrospective study of the clinical significance of chorionic bump at early stage of gestation. Am J Reprod Immunol. 2021;85(3):e13346.
- Arleo EK, Dunning A, Troiano RN. Chorionic bump in pregnant patients and associated live birth rate: a systematic review and meta-analysis. J Ultrasound Med. 2015;34(4):553–557.
- Tan S, Ipek A, Akın Sivaslıoğlu A, et al. The chorionic bump: radiologic and pathologic correlation. J Clin Ultrasound. 2011;39(1):35–37.
- Petriglia G, Palaia I, Musella A, et al. Threatened abortion and late-pregnancy complications: a case-control study and review of literature. Minerva Ginecol. 2015;67(6):491–497.
- Carvalho RS, Osório M, Brito C, et al. Chorionic bump in a pregnant patient with a history of infertility. BMJ Case Rep. 2018; 2018:bcr2018225091.