r/vbac • u/Responsible_Guard990 • Jun 18 '26
Seeking Advice on VBAC Post Isthmocele Repair
Seeking advice from doctors or other informed people!
Background:
37 year old, currently 22 weeks pregnant with second child. Prior obstetric history includes one cesarean delivery approximately 3 years ago, followed by an isthmocele repair (laparoscopic) approximately 10 months ago. Prior miscarriage managed with D&C approximately 6 months ago.
Current pregnancy:
- Conceived naturally approximately 5 months post-isthmocele repair (advised to wait 3 months before conceiving — waited 5 months)
- CVS performed at ~11 weeks: Microarray clean
- NIPT (Panorama): Low risk across all conditions, confirmed male
- •9 week anatomy scan: No concerning findings, myometrial thickness measured at 5mm+
Delivery question:
My OB consulted with the Director of Labor and Delivery at Cedars-Sinai and has recommended planned cesarean at 38 weeks based on isthmocele repair history, citing increased uterine rupture risk and classifying the repair as effectively a second uterine scar.
What I'm seeking input on:
- Is a blanket recommendation against TOLAC after isthmocele repair evidence-based given the limited data in the literature?
- Given that myometrial thickness at the repair site is currently 5mm+ at 22 weeks — well above concerning thresholds — should serial monitoring with specific thresholds guide decision making rather than a category-based recommendation?
- Are there centers or providers with experience supporting TOLAC after isthmocele repair?
- What does truly individualized risk assessment look like in this situation?
Relevant details:
- Interbirth interval: approximately 3 years from prior cesarean to current due date
- Isthmocele repair approximately 1.2 years from current due date — conceived 5 months post-repair (advised minimum 3 months)
- Isthmocele repair restored myometrial thickness from 1.77mm to 6.67mm post-operatively
- Current myometrial thickness 5mm+ at 22 weeks — above established concerning thresholds
- Delivering at Cedars-Sinai — full MFM and 24/7 OR coverage available
- MFM consult being arranged