Cervical cerclage is commonly used in the management of women considered to be at high risk of second‐trimester loss and spontaneous preterm birth. Insertion is dictated by factors such as multiple pregnancy, uterine anomalies, a history of cervical trauma through destructive procedures or forced dilatation, and cervical shortening seen on transvaginal ultrasound examination. However, its use and efficacy in these different groups is highly controversial as there is contradiction in the results of individual studies and meta‐analyses. This review examines the contemporary evidence on cervical cerclage and its current role in obstetrics.