Introduction: Cervical cerclages reduce spontaneous preterm labour risks in patients with cervical incompetency, but their effectiveness varies by indication. This study evaluates cerclage outcomes and identifies risk factors for cervical incompetence in “low-risk” patients without a history of preterm labour or second-trimester miscarriage. Methods: A retrospective study of 149 cervical cerclages was conducted at National University Hospital, Singapore, from January 2008 and October 2017. Cerclages were categorized into history-indicated (HIC), ultrasound-indicated (UIC) and rescue (RC) types. Data was extracted from electronic health records.  Results: RC had the lowest success rate (55.6%) compared to HIC (91.6%) and UIC (92.3%). RC group had higher odds of cerclage failure (OR 8.69, p<0.001, 95% CI 2.94 – 25.68) and having at least one maternal complication (OR 2.74, p=0.029, 95% CI 1.11 – 6.76) than HIC group. No significant differences in cerclage success rates and maternal complications were found between HIC and UIC groups. RC had the lowest neonatal survival rate (73.3%) compared to HIC (98.7%) and UIC (100%) groups. The odds of at least one neonatal complication in RC and UIC groups were 11.67 (p<0.001, 95% CI 3.06 – 44.51) and 3.22 (p=0.045, 95% CI 1.03 – 10.10) times that of HIC group. No risk factors were found for cervical incompetence in RC group. Conclusion: Maternal and neonatal outcomes are better for singleton pregnancies which undergo HIC and UIC, compared to RC. Reconsidering current guidelines to include routine cervical length screening, particularly for “low-risk” women, can provide the opportunity for early placement of UIC and reduce reliance on emergency cerclages.