Related Experiment Video
Updated: Jul 7, 2026

Modeling Ascending Vaginal Infection, Preterm Birth, and Neonatal Morbidity in Mice
Published on: October 10, 2025
[Antimicrobial therapy associated with preterm birth]
Zoltán Kazy1, Erzsébet Puhó, Endre Czeizel
1Semmelweis Egyetem, Altalános Orvostudományi Kar, II. Szülészeti és Nogyógyászati Klinika, Budapest. kazydoki@gmai.com
Insights
Ampicillin and clotrimazole show potential in preventing preterm birth. This study evaluated 51 antimicrobial drugs, finding these two most effective, especially when used in early pregnancy.
Area of Science:
- Obstetrics and Gynecology
- Pharmacology
- Public Health
Background:
- Preterm birth remains a significant global health concern.
- Infectious diseases during pregnancy are a known risk factor for preterm birth.
- Antimicrobial drug use is common during pregnancy, necessitating an understanding of their effects on birth outcomes.
Purpose of the Study:
- To evaluate the efficacy of 51 antimicrobial drugs in reducing the incidence of preterm birth.
- To identify specific antimicrobial agents with a potential preventive effect on preterm birth.
Main Methods:
- A population-based study utilizing data from the Hungarian Case-Control Surveillance of Congenital Abnormalities (1980-1996).
- Inclusion of 38,151 newborn infants without birth defects.
- Comparison of preterm birth rates between infants born to mothers who received specific antimicrobial drugs and those who did not, with gestational age as a primary outcome.
Main Results:
- Evaluation of 51 antimicrobial drugs for their effect on preterm birth.
- Ampicillin and clotrimazole demonstrated a notable preventive effect on preterm birth.
- The preventive effect was most pronounced when these drugs were administered during the first trimester of pregnancy.
Conclusions:
- Ampicillin and clotrimazole may serve as effective interventions for reducing preterm birth.
- These findings are particularly relevant for pregnant women experiencing infectious diseases.
- Further research may explore the mechanisms and optimal use of these antimicrobials in preventing preterm birth.
Unlabelled:
The effect of 51 antimicrobial drugs was evaluated for the reduction of preterm birth.
Study Design:
Newborn infants without birth defects were selected from the population-based large data set of the Hungarian Case-Control Surveillance of Congenital Abnormalities, 1980-1996, for the study. Medically recorded gestational age and the proportion of preterm birth were the primary outcomes of the study and newborn infants born to mothers with or without a given antimicrobial drug were compared.
Results:
The use of 51 antimicrobial drugs in the mothers of 38 151 newborn infants including at least ten pregnant women was evaluated. Only two: ampicillin and clotrimazole showed an obvious preterm birth preventive effect, mainly after the use during the first trimester of pregnancy.
Conclusions:
Our findings suggest that ampicillin and particularly clotrimazole may be effective for the reduction of preterm birth associated with infectious diseases of pregnant women.
Related Concept Videos
Microbiota Modulation by Antibiotics
Development of the Oral Microbiota
Acute Pyelonephritis II: Diagnostic Studies and Management
Urinary Tract Infection III: Diagnostic Studies and Interprofessional Care
Development of Human Microbiota
Antimicrobial Effectiveness
