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Outcome parameters were compared using Student <jats:italic>t<\/jats:italic> test, \u03c7<jats:sup>2<\/jats:sup> test, Fisher exact test, and log\u2010rank \u03c7<jats:sup>2<\/jats:sup> test.<\/jats:p><\/jats:sec><jats:sec><jats:title>Results<\/jats:title><jats:p>OMP significantly prolonged the latency period (33.29 \u00b1 22.16 vs 23.07 \u00b1 15.42 days; <jats:italic>P<\/jats:italic> = 0.013). Log\u2010rank analysis revealed a significant difference in mean time to delivery between the 2 groups (<jats:italic>P<\/jats:italic> = 0.014). There were significantly fewer preterm births (33% vs 58%; <jats:italic>P<\/jats:italic> = 0.034) and low birth weight neonates (37% vs 64%; <jats:italic>P<\/jats:italic> = 0.017), and significantly higher mean birth weight (2.44 \u00b1 0.58 vs 2.14 \u00b1 0.47 kg; <jats:italic>P<\/jats:italic> = 0.009) in the OMP group. Perinatal outcomes and adverse effects were similar in the 2 groups.<\/jats:p><\/jats:sec><jats:sec><jats:title>Conclusion<\/jats:title><jats:p>Maintenance tocolysis with OMP significantly prolonged pregnancy and decreased the number of preterm births.<\/jats:p><jats:p><jats:bold>Clinical Trial Registry of India: CTRI\/2011\/10\/002043.<\/jats:bold><\/jats:p><\/jats:sec>","DOI":"10.1016\/j.ijgo.2014.01.019","type":"journal-article","created":{"date-parts":[[2014,4,3]],"date-time":"2014-04-03T07:20:19Z","timestamp":1396509619000},"page":"60-63","update-policy":"https:\/\/doi.org\/10.1016\/elsevier_cm_policy","source":"Crossref","is-referenced-by-count":26,"title":["Maintenance tocolysis with oral micronized progesterone for prevention of preterm birth after arrested preterm labor"],"prefix":"10.1002","volume":"126","author":[{"given":"Manju","family":"Choudhary","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Amita","family":"Suneja","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Neelam B.","family":"Vaid","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Kiran","family":"Guleria","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"M.M.A.","family":"Faridi","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"311","published-online":{"date-parts":[[2014,4,3]]},"reference":[{"key":"e_1_2_6_2_2","unstructured":"Reducing Perinatal and Neonatal Mortality. 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