The comparison of USG measured cervical length in pregnant women with previous induced abortion versus those who have not had an induced abortion

Harshita Naidu, Nivedita Hegde, Anjali M., Rohini Kanniga, Akhila Vasudeva


Background: The majority of women who undergo induced abortion are young and of low parity. Hence, it is desirable to look for any association effects of induced abortion with future reproductive outcomes. In this study, we aim to compare ultrasound measured cervical length in pregnant women with previous induced abortion versus those who have not had an induced abortion.

Methods: This was a prospective observational study performed at tertiary care hospital. Total of 400 patients were recruited, divided into two groups. Patients with an induced abortion in previous pregnancy were included as cases and those with no history were taken as controls. Cervical length was measured by transvaginal ultrasound in all participants at 11-14, 18-22 and 28-32 weeks. Pregnancies were followed up to note incidence of spontaneous preterm delivery, preterm pre labour rupture of membranes (PPROM), threatened preterm, and second trimester miscarriage.

Results: Authors have found that there was no significant difference in the cervical length of pregnant patients with or without a history of prior induced abortions.  In our study authors found that mean cervical length at 11-14weeks, 18-22 weeks, and 28-32 weeks was 3.47±0.126cm and 3.48±0.195cm; 3.44±0.296cm and 3.49±0.182cm; 3.36±0.477cm and 3.42±0.310cm respectively among cases and controls. However, there was a demonstrably increased risk of spontaneous preterm delivery, PPROM and threatened preterm in patients with a history of prior induced abortion.

Conclusions: Authors conclude that previous induced abortion increases the risk of threatened preterm, PPROM, spontaneous preterm delivery in the subsequent pregnancy. But, this risk is not predictable by measuring cervical length as the mean cervical length remained the same in both the groups.


Cervical length, Induced abortion, Preterm labor, Preterm pre labour rupture of membranes, Short cervix

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Singh S, Shekhar C, Acharya R, Moore AM, Stillman M, Pradhan MR, et al. The incidence of abortion and unintended pregnancy in India, 2015. The Lancet Global Health. 2018;6(1):e111-20.

Dhaliwal LK, Gupta KR, Gopalan S. Induced abortion and subsequent pregnancy outcome. J Family Welfare. 2003;49(1):50-5.

Molin A. Risk of damage to the cervix by dilatation for first-trimester-induced abortion by suction aspiration. Gynecol Obstetric Invest. 1993;35(3):152-4.

Makhlouf MA, Clifton RG, Roberts JM, Myatt L, Hauth JC, Leveno KJ, et al. Adverse pregnancy outcomes among women with prior spontaneous or induced abortions. Am J Perinatol. 2014;31(9):765-72.

Saccone G, Perriera L, Berghella V. Prior uterine evacuation of pregnancy as independent risk factor for preterm birth: a systematic review and metaanalysis. Am J Obstet Gynecol. 2016;214(5):572-91.

McCarthy FP, Khashan AS, North RA, Rahma MB, Walker JJ, Baker PN, et al. Pregnancy loss managed by cervical dilatation and curettage increases the risk of spontaneous preterm birth. Human Repro. 2013;28(12):3197-206.

Hardy G, Benjamin A, Abenhaim HA. Effect of induced abortions on early preterm births and adverse perinatal outcomes. J Obstet Gynaecol Canada. 2013;35(2):138-43.

Lemmers M, Verschoor MA, Hooker AB, Opmeer BC, Limpens J, Huirne JA, et al. Dilatation and curettage increases the risk of subsequent preterm birth: a systematic review and meta-analysis. Human Repro. 2015;31(1):34-45.

Boelig RC, Villani M, Jiang E, Orzechowski KM, Berghella V. Prior uterine evacuation and the risk of short cervical length: a retrospective cohort study. J Ultrasound Med. 2018;37(7):1763-9.

Visintine J, Berghella V, Henning D, Baxter J. Cervical length for prediction of preterm birth in women with multiple prior induced abortions. Ultrasound Obstet Gynecol. 2008;31(2):198-200.