Related Experiment Video
Updated: Jun 20, 2026

Modeling Ascending Vaginal Infection, Preterm Birth, and Neonatal Morbidity in Mice
Published on: October 10, 2025
[Epidemiology and etiology of preterm delivery]
Maija Jakobsson1, Jorma Paavonen
1HYKS:n naistensairaala, PL 140, 00029 Helsinki.
Abstract:
The causes of the increase in preterm delivery are unknown. A large proportion of very early childbirths are due to infections, with a previous preterm delivery also constituting a strong risk factor. As much as 60% of preterm deliveries are, however, first births, whereby predicting is difficult. Important risk factors also include smoking, diseases of the mother and the fetus as well as the mother's age and social status. Prematurity is more common among blacks. Despite being previously considered safe, loop electrosurgery of the vaginal part of the cervix also predisposes to preterm delivery.
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