Sharma, R., Minhas, S. and Sood, R. 2017. To study the efficacy of digital and transvaginal ultrasonographic measurement of cervical length in asymptomatic high risk women at POG 16-24 weeks as a predictor of preterm delivery and progesterone and cerclage vs. progesterone alone for short cervical length in prevention of preterm labour. International Journal of Reproduction, Contraception, Obstetrics and Gynecology. 4, 1 (Feb. 2017), 146–151.