Maternal-Fetal Medicine

Preconception Counseling

Multiple Prior Cesarean Deliveries

Risk Quantification & Optimization Strategy

ACOG SMFM High-Risk OB

DoctorsWhoCode.blog · OpenMFM.org

Preconception Assessment

Goals of Counseling

🎓

Educate

Inform on implications for future pregnancy

📊

Assess

Customize individual risk profile

⚙️

Optimize

Intervene medically prior to conception

🎯

Goal

Minimize likelihood of poor perinatal outcomes

ACOG Practice Bulletin; Preconception Care Guidelines

Surgical Risk

Compounding Risks with Each Cesarean

≥4

Prior Cesarean Deliveries

↑↑

Progressive Maternal Morbidity

5th

Anticipated Abdominal Surgery

Serious maternal morbidity increases progressively with each prior cesarean delivery. Future reproductive plans are a central focus of counseling.

Silver RM et al. Obstet Gynecol. 2006

Placenta Accreta Spectrum

PAS: The Primary Threat

🔴

Most Life-Threatening Complication

Risk shifts drastically based on placental location in the subsequent pregnancy.

⚠️

Anterior Placenta Previa

Greater than 50% risk of cesarean hysterectomy in the next pregnancy.

🔬

Mechanism

Abnormal trophoblast invasion through prior uterine scar(s).

Marshall NE et al. AJOG 2011; ACOG PB 183

Quantitative Risk

PAS Risk: Previa + ≥3 Prior Cesareans

Complication	No Prior CD (Baseline)	≥3 Prior CDs + Previa
Placenta Accreta	3.3 – 4%	50 – 67%
Cesarean Hysterectomy	0.7 – 4%	50 – 67%
Composite Maternal Morbidity	15%	83% (OR 33.6; 95% CI 14.6–77.4)

Marshall NE et al. AJOG 2011

Surgical Morbidity

Adhesive Disease & Visceral Injury

0.6%

Bladder Injury
Standard Repeat CD

11.7%

Bladder Injury
PAS Cases

🔗

Dense Adhesions

Distort anatomy; increase operative time and blood loss.

🫀

Bowel Injury

Risk similarly elevated in repeat abdominal surgery.

Nisenblat V et al. BJOG 2006; ACOG PB 183

Uterine Rupture

Absolute Contraindication to Labor

🚫

≥4 Prior Hysterotomies

Absolute contraindication to trial of labor. Spontaneous labor must be precluded.

📅

Delivery Plan

Elective, scheduled repeat cesarean delivery prior to onset of labor.

📋

Operative Reports

Acquire and review all prior reports: incision type, adhesions, surgical complexity.

ACOG PB 205; SMFM Consult Series

Preconception Optimization

Maternal Optimization Prior to Conception

⚖️

BMI / Obesity

Individualized nutritional counseling. Excess GWG compounds surgical risk.

💉

Anemia

Correct baseline Hgb. Maximize stores to reduce transfusion need.

🫀

Comorbidities

Assess and manage hypertension, diabetes, and other medical conditions.

Optimizing health prior to pregnancy improves both pregnancy and lifelong health outcomes.

ACOG CO 762; March of Dimes Preconception Guidelines

Weight Management

Gestational Weight Gain: Compounding Risks

📈

Hypertensive Disorders

Excess GWG significantly increases preeclampsia and gestational hypertension risk.

🩸

Gestational Diabetes

Obesity amplifies GDM risk, adding to surgical complexity.

👶

Macrosomia

Increases operative difficulty and blood loss during cesarean.

⚖️

Long-term Obesity

Excess GWG compounds hazards of a 5th surgical delivery.

ACOG CO 548; Siega-Riz AM et al. AJOG 2009

Reproductive Planning

Reproductive Life Planning

👨‍👩‍👧‍👦

Confirm Desired Family Size

Reproductive goals must be explicitly discussed prior to any future conception.

✂️

Bilateral Salpingectomy

Highly recommended at time of next cesarean delivery if family is complete. Also reduces ovarian cancer risk.

📝

Advance Counseling

Document discussion of sterilization in preconception visit note.

ACOG CO 774; SMFM Consult Series

Future Pregnancy Management

Clinical Directives If Conception Occurs

First Trimester — Scar Ectopic Surveillance

Transvaginal ultrasound to rule out cesarean scar ectopic pregnancy and map gestational sac location.

18–20 Weeks — PAS Screening

Detailed ultrasound for placenta previa and sonographic markers of PAS (lacunae, loss of clear zone, bladder wall irregularity).

PAS Suspected — Multidisciplinary Referral

MFM specialist, tertiary center with massive transfusion protocol, GYN-ONC, urology, and interventional radiology.

Delivery Planning

Scheduled cesarean 37+0–38+0 wks (standard); 34+0–35+6 wks if PAS confirmed.

ACOG PB 183; SMFM PAS Consult Series 2018

Delivery Planning

Delivery Timing & Informed Consent

📅

Standard Scheduled CD

37+0 – 38+0 weeks gestation to preclude spontaneous labor.

⚡

PAS Confirmed

34+0 – 35+6 weeks to ensure a controlled surgical environment.

📋

Advance Surgical Consent Must Include

🩸 Massive Hemorrhage 🫀 Visceral Organ Injury 🔪 Unplanned Hysterectomy 🏥 ICU Admission

ACOG PB 183; SMFM Consult 2018

Summary

Preconception Action Checklist

Action Item	Priority
Review all prior operative reports	Mandatory
Counsel on PAS / hysterectomy risk	Mandatory
Establish absolute contraindication to labor	Mandatory
Correct anemia; optimize BMI, BP, glucose	High Priority
Discuss reproductive life planning / salpingectomy	High Priority
Plan early first-trimester ultrasound in next pregnancy	Standard of Care
Identify tertiary center for delivery if PAS suspected	Standard of Care

ACOG / SMFM / NICE Guidelines