Uterine and Pelvic Conditions · Acquired Uterine Conditions

Isthmocele and Infertility

Baldini GM, Lot D, Malvasi A, Di Nanni D, Laganà AS, Angelucci C, Tinelli A, Baldini D, Trojano G

Published April 10, 2024 Journal of Clinical Medicine, 13(8), 2192
DOI 10.3390/jcm13082192 PMID 38673465 PMC PMC11050579

RRM Academy Synopsis

Isthmocele after cesarean appears linked to lower pregnancy rates

A 2024 review reports that isthmocele is linked to lower pregnancy rates, including after IVF. Isthmocele is a gap in the uterine scar, often seen after cesarean section. One cited study followed 234 women with infertility linked to isthmocele. About 65 out of 100 became pregnant after surgery.

Key Findings

  • A 2020 analysis cited in the review put the share of women with isthmocele after cesarean section anywhere from 20% to 70%.
  • A cited systematic review of 234 patients with secondary infertility linked to isthmocele reported 153 patients (65.4%) pregnant after surgery. Live births followed in 87.1% (101 out of 116) of documented pregnancies.
  • The one randomized controlled trial in that systematic review recorded a 75% pregnancy rate with hysteroscopy against 32% for untreated cases.
  • A cited retrospective cohort of 2231 women and 2515 IVF cycles found a live birth rate of 18.99% with a niche and 31.51% without one.
  • A 2023 systematic review and meta-analysis of eight studies found moderate quality evidence of a negative effect of isthmocele on live birth rate in women undergoing IVF.

Interpretation

This review combines a systematic review, a meta-analysis, several retrospective cohorts, and case series on isthmocele and fertility. The authors found a link between isthmocele and lower IVF success. Pregnancy and live birth rates were higher after surgery to repair the defect. The authors note that the exact cause of this link is not yet known. The findings support larger trials of surgical repair in women with isthmocele-related infertility.

RRM Context

Restorative reproductive medicine looks for the cause of infertility before choosing a treatment. A scar defect in the uterus is one possible structural cause. The review names transvaginal ultrasound and MRI as the main ways to find it. IVF places an embryo in the same uterus and leaves the defect in place, while surgery repairs it. Infertility labeled unexplained is undiagnosed, and a structural finding like this is one way to reach a diagnosis.

Abstract

Isthmocele is a gynecological condition characterized by a disruption in the uterine scar, often associated with prior cesarean sections. This anatomical anomaly can be attributed to inadequate or insufficient healing of the uterine wall following a cesarean incision. It appears that isthmocele may impact a woman's quality of life as well as her reproductive capacity. The incidence of isthmocele can range from 20% to 70% in women who have undergone a cesarean section. This review aims to sum up the current knowledge about the effect of isthmocele on fertility and the possible therapeutic strategies to achieve pregnancy. However, currently, there is not sufficiently robust evidence to indicate the need for surgical correction in all asymptomatic patients seeking fertility. In cases where surgical correction of isthmocele is deemed necessary, it is advisable to evaluate residual myometrial thickness (RMT). For patients with RMT >2.5-3 mm, hysteroscopy appears to be the technique of choice. In cases where the residual tissue is lower, recourse to laparotomic, laparoscopic, or vaginal approaches is warranted.

Topics

By this author

Related research

Uterine and Pelvic Conditions › Acquired Uterine Conditions › Cesarean Scar Defect · Reproductive Surgery › Uterine Surgery › Cesarean Scar Repair · Infertility › Uterine Factor › Uterine Anomalies
Giorgio Maria Baldini, Dario Lot, Antonio Malvasi, Doriana Di Nanni, Antonio Simone Laganà, Cecilia Angelucci, Andrea Tinelli, Domenico Baldini, Giuseppe Trojano
G Baldini, D Lot, A Malvasi, D Nanni, A Laganà, C Angelucci, A Tinelli, D Baldini, G Trojano
PMID 38673465 38673465 DOI 10.3390/jcm13082192 10.3390/jcm13082192 Baldini et al. 2024, Baldini 2024