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Azithromycin reduces maternal infection in laboring women in low- and middle-income countriesAntibiotic reduces maternal infection risk in labor

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Key Takeaway
Consider azithromycin for maternal infection reduction in labor, but note no neonatal benefit and regional variability.

This secondary analysis of a large randomized trial evaluated azithromycin versus placebo in women at or beyond 28 weeks gestation in labor planning vaginal delivery across seven low- and middle-income countries. The study assessed maternal infection, maternal sepsis, and neonatal infection outcomes.

The authors observed that azithromycin reduced maternal infection among those who did not receive non-study antibiotics, with a similar reduction in maternal sepsis. Among those who received non-study antibiotics, the reduction was more modest. However, neonatal infection was not significantly reduced in any group.

Key limitations include the secondary analysis design, which precludes establishing causality, and the finding that results were not statistically significant when stratified by region. The authors note that further research is warranted to determine the most effective strategies.

Clinically, these findings suggest a potential benefit of azithromycin for reducing maternal infection and sepsis in this population, but the lack of effect on neonatal infection and regional variability should temper enthusiasm. Moderate certainty supports maternal infection reduction, while certainty for neonatal outcomes remains low.

A large study involving nearly 30,000 women in low- and middle-income countries found that a single dose of azithromycin given during labor reduced the risk of maternal infection and sepsis. The study was a secondary analysis of a randomized controlled trial, meaning the results are suggestive but not definitive.

Women who received azithromycin had a lower chance of developing an infection compared to those who got a placebo. The benefit was seen both in women who did and did not receive other antibiotics, though the reduction was larger in those not given additional antibiotics. Maternal sepsis rates also appeared lower with azithromycin.

However, the drug did not significantly reduce infections in newborns. The results also varied by region and were not statistically significant when analyzed separately for each site. This means the overall finding may not apply equally everywhere.

Because this is a secondary analysis, the findings should be considered preliminary. More research is needed to confirm the best way to use azithromycin in labor. For now, the study suggests a potential benefit for mothers, but no change in practice is warranted based on this analysis alone.

What this means for you:
Azithromycin during labor may reduce maternal infections, but more research is needed.

Study Details

Study typeRct
Sample sizen = 287
EvidenceLevel 2
PublishedJun 2026
View Original Abstract ↓
OBJECTIVE: The randomized trial of azithromycin to reduce maternal and neonatal sepsis (the A-PLUS Trial) found substantial reduction in maternal sepsis among women receiving azithromycin and substantial non-study antibiotic use. This secondary analysis explored the effect modification of non-study antibiotics on azithromycin versus placebo on maternal and newborn infection among A-PLUS participants. METHODS: Women ≥28 weeks gestation in labor and planning a vaginal delivery at a study hospital in seven low- and middle-income countries (Bangladesh, India [two sites], Pakistan, Guatemala, Kenya, Democratic Republic of Congo, and Zambia) were eligible for inclusion. Non-study antibiotic use was collected prospectively. We estimated the interaction of non-study antibiotics with azithromycin versus placebo on maternal and newborn sepsis. RESULTS: A total of 29 287 participants were randomized (14 590 to azithromycin; 14 688 to placebo). Maternal infection was reduced among the azithromycin group compared to placebo among those who did not receive non-study antibiotics, with estimated relative risk (RR) 0.58 (95% confidence interval [CI] 0.48, 0.70), and among those who received non-study antibiotics, with RR 0.80 (95% CI 0.70, 0.91). Similar results were observed for maternal sepsis. Neonatal infection was not significantly reduced in any group. These results were similar when stratified by African and Asian region but not statistically significant. CONCLUSION: Our results suggest a benefit of azithromycin in reducing maternal infection or sepsis across all groups, with a larger reduction in risk among participants who had not received other antibiotics. Given the concerns of inappropriate use of antibiotics, further research is warranted to determine the most effective strategies of reducing risk of infection.
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