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Published 30 December 2008, doi:10.1136/bmj.a3015
Cite this as: BMJ 2008;337:a3015
Can cause harm, so should be used only after careful consideration
| The first 150 words of the full text of this article appear below. |
The incidence of preterm birth (<37 weeks gestation) is rising. Preterm birth currently occurs in 7.6% of live births in England and Wales and 12.5% of births in the United States, where the annual cost exceeds $26.2bn (£17.5bn;
20bn).1 Up to three quarters of these births have a spontaneous onset. Evidence that labour is associated with an inflammatory process is increasing.2
Very preterm birth (<32 weeks) is commonly associated with infection3; micro-organisms usually gain access to the sterile uterine cavity by ascending from the vagina. Other routes include haematogenous spread, iatrogenic introduction, and retrograde spread through the fallopian tubes. The risk of preterm birth is higher with pyelonephritis and bacterial vaginosis. Intrauterine activation of prostaglandins and phospholipase A2 by micro-organisms may cause contractions or preterm rupture of the membranes.4 Infection can also cause neurological damage and cerebral palsy.3
It would seem logical to use antibiotics to tackle this insult
Andrew H Shennan, professor of obstetrics, Manju Chandiramani, clinical research fellow
1 Kings College London Division of Reproduction and Endocrinology, Department of Womens Health, London SE1 7EH
andrew.shennan@kcl.ac.uk
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