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We included in the study 47 patients who carried on pregnancy and delivered a viable fetus. Patients were asked about postconization pregnancies, obstetrical outcomes, and a possible diagnosis of secondary infertility caused by cervical stenosis. We evaluated the depth of surgical excision, the timing between cervical conization and subsequent pregnancies, surgical technique, and maternal age at delivery. We recorded 47 deliveries, 10 cases of preterm delivery; 8 of them were spontaneous. The depth of surgical excision showed a statistically significant inverse correlation with gestational age at birth. The risk of spontaneous preterm delivery increased when conization depth exceeded a cut-off value of 1.5\u2009cm. Our data do not demonstrated a relation between conization and infertility due to cervical stenosis.<\/jats:p>","DOI":"10.1155\/2013\/686027","type":"journal-article","created":{"date-parts":[[2013,11,13]],"date-time":"2013-11-13T16:22:12Z","timestamp":1384359732000},"page":"721-726","source":"Crossref","is-referenced-by-count":25,"title":["Risk of Preterm Delivery Associated with Prior Treatment of Cervical Precancerous Lesion according to the Depth of the Cone"],"prefix":"10.1155","volume":"35","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-2324-5409","authenticated-orcid":true,"given":"Roberto","family":"Berretta","sequence":"first","affiliation":[{"name":"Department of Surgical Sciences, University of Parma, Via Gramsci 14, 43100 Parma, Italy"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Salvatore","family":"Gizzo","sequence":"additional","affiliation":[{"name":"Department of Woman and Child Health, University of Padua, Via Giustiniani 3, 35128 Padova, 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