Maternal-Fetal Medicine · Patient Education
What your surgical history means — and how we plan together.
What Is This?
A myomectomy removed one or more fibroids — non-cancerous growths — from your uterus. Your uterus was repaired and healed, forming a scar.
Why Does It Matter?
The healed scar on your uterus is strong — but it requires careful monitoring during a future pregnancy. Your care team will plan around it.
The Critical Detail
Was the inner lining of the uterus — the uterine cavity — entered during your surgery?
Fibroid removed from the wall only. Inner lining untouched.
→ Vaginal delivery likely safe
Surgery reached or opened the inner lining of the uterus.
→ Cesarean delivery recommended
Your operative report confirms which applies to you.
Understanding Risk
Uterine rupture — a tear at the scar — is the primary concern after myomectomy. The overall risk is low.
Important Difference from C-Section Scars
Unlike C-section scars, myomectomy scars may rupture before labor starts. About 71% of ruptures occur before 36 weeks — making early monitoring essential.
This is why we do not wait until term for high-risk scars.
Delivery Planning · Scenario A
When the inner lining was not breached, vaginal delivery is usually safe. Success rates reach 90%. This is called a Trial of Labor After Myomectomy (TOLAM).
Delivery Planning · Scenario B
When the inner lining was entered, a planned cesarean (C-section) is recommended. This protects against scar separation. Delivery is planned at 37–38 weeks.
At a Glance
| Surgical History | Delivery Mode | Timing | Guideline |
|---|---|---|---|
| Cavity NOT entered (subserosal / intramural) | Vaginal (TOLAM) | 390/7 weeks or later | ACOG / SMFM |
| Cavity WAS entered | Cesarean | 370/7 – 386/7 weeks | ACOG / SMFM |
| Prior uterine rupture | Cesarean | 360/7 – 370/7 weeks | ACOG / SMFM |
Timing is based on your individual scar risk. Your team will confirm your plan.
What Affects Your Risk Level
Certain surgical details may increase risk. Your care team reviews these when planning your care.
These are theoretical risk factors. Most patients heal without complications.
Surgical Approach
Whether your surgery was laparoscopic or open (abdominal), rupture risk is similar — provided the uterine wall was properly closed in multiple layers.
Minimally invasive. Small incisions. Similar scar integrity when properly sutured.
Traditional approach. Larger incision. Similar rupture risk with multi-layer closure.
Safety — Know These Signs
During pregnancy, these symptoms may signal scar stress. Do not wait — call your care team right away.
Rupture can occur even without labor contractions. Early recognition saves lives.
Labor Management
All patients with a prior myomectomy receive continuous electronic fetal monitoring during labor. A sudden change in fetal heart rate is the most common early sign of scar stress.
Caution is used with prostaglandins for cervical ripening in patients with a scarred uterus.
Action Item — Do This Now
Your original operative report tells your MFM team exactly what was done — and guides your entire pregnancy management plan.
Key detail to confirm: Was the uterine cavity entered? What suture technique was used?
You Are Not Alone
Your MFM specialist, OB, and care team work together to create a personalized plan — so you can focus on your growing family.
Most patients with prior myomectomy have healthy pregnancies and deliveries.
Summary
Shared Decision-Making