Icon Legend

This session is not in your schedule.

This session is in your schedule. Click again to remove it.

Presentation Icons

Additional registration fee required

Faculty have requested this content not be shared outside of the session

CME Credit Offered

Abstract Award

Recording available 2/16-5/2

AIUM Credit

Foundation Awardee

Poster Icons

Abstract Award

Foundation Awardee

Poster Session 2

Category: Infectious Diseases

Poster Session 2

(619) Association of Prolonged Labor with Infectious Outcomes in Nulliparous Women with Isolated Intrapartum Fever

Wednesday, February 11, 2026

3:30 PM - 5:00 PM

Submitting Author and Presenting Author(s)

Ohad Houri, MD, MSc (he/him/his)

Doctor
BCNatal Fetal Medicine Research Center
BARCELONA, Catalonia, Spain

Coauthor(s)

LM

Liel Mharian, MD

Meir Medical Center
Kfar Saba, HaMerkaz, Israel
MG

Mor Ginat Shaked, MD

Rabin medical center
Petah Tikva, HaMerkaz, Israel
Or Bercovich, BSc, MD (he/him/his)

Helen Schneider Hospital for Women, Rabin Medical Center, Petach Tikva, Israel
Helen Schneider Hospital for Women, Rabin Medical Center, Petach Tikva, HaMerkaz, Israel
YM

Yarin Mash, MD

Rabin medical center
Petah Tikva, HaMerkaz, Israel
AW

Asnat Walfisch, MD, PhD

Rabin Medical Center
Petach Tikva, HaMerkaz, Israel
AR

Asaf Romano, MD (he/him/his)

OBGYN attending
Helen Schneider Hospital for Women, Rabin Medical Center
Petah Tikva, HaMerkaz, Israel
YG

Yossi Geron, MD

Helen Schneider Hospital for Women, Rabin Medical Center
Petah Tikva, HaMerkaz, Israel
Natav Hendin, MD

Rabin Medical Center
Petah Tikva, HaMerkaz, Israel

Objective:
To evaluate the association between total labor duration and maternal or neonatal infectious outcomes among nulliparous women with isolated intrapartum fever.

Study Design:
We conducted a retrospective cohort study of nulliparous women with singleton gestations and isolated intrapartum fever (≥37.8°C, without clinical chorioamnionitis) who reached the second stage of labor. All women delivered at a single tertiary center between 2012 to 2024. For all patients, urine and blood cultures were obtained at the time of fever diagnosis, and placental cultures were collected at delivery. Blood cultures and pediatric assesment were obtained from all neonates upon deliver. Patients were stratified by total labor duration: < 12 hours (n=505), 12–18 hours (n=319), and >18 hours (n=192). Outcomes were compared using chi-square or Fisher’s exact tests for categorical variables and Kruskal-Wallis test for continuous variables. Composite maternal culture positivity was defined as a positive placental, urine, or blood culture.

Results:
Out of 1,710 deliveries, a total of 1,016 women were included. The composite maternal culture positivity rate was similar across groups (11.1% vs. 11.0% vs. 15.6%, p=0.13), as were individual rates of bacteremia (3.2% vs. 2.2% vs. 4.2%, p=0.31). However, urine culture positivity increased with longer labor (4.2% vs. 6.9% vs. 8.3%, p=0.045). Maximum postpartum fever was slightly higher in shorter labor groups (p=0.024), and postpartum stay was unchanged (median 3 days across all groups, p=0.09). Neonatal sepsis, NICU admission, and antibiotic use were not associated with labor duration. In contrast, Apgar scores were lower in the >18h group: 1-min Apgar < 7 (15.1% vs. 6.5–7.8%, p< 0.01) and 5-min Apgar < 7 (6.2% vs. 1.3–2.8%, p=0.04).

Conclusion:
Prolonged labor in nulliparous women with isolated intrapartum fever was not associated with an increased rate of maternal or neonatal infection. However, it was associated with significantly lower Apgar scores, suggesting potential neonatal compromise in this subgroup.