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The purpose of this study was to systematically assess the efficiency and safety of this strategy by comparing it with conventional ovarian stimulation protocols.<\/jats:p><\/jats:sec><jats:sec><jats:title>Design<\/jats:title><jats:p>Retrospective cohort study.<\/jats:p><\/jats:sec><jats:sec><jats:title>Subjects<\/jats:title><jats:p>Patients with normal ovarian reserve undergoing ovum pick\u2010up (OPU) cycles between April 2012 and September 2013 were enrolled: 708 patients underwent the LPS protocol compared with 745 patients who underwent the mild treatment protocol and 1287 patients who underwent the short\u2010term protocol.<\/jats:p><\/jats:sec><jats:sec><jats:title>Measurements<\/jats:title><jats:p>Number of mature oocytes retrieved and top\u2010quality embryos obtained, implantation rate, pregnancy rate, live birth and ongoing pregnancy rate and neonatal outcomes.<\/jats:p><\/jats:sec><jats:sec><jats:title>Results<\/jats:title><jats:p>The numbers of mature oocytes retrieved and top\u2010quality embryos obtained per OPU cycle were significantly increased in the LPS group (10\u00b79\u00a0\u00b1\u00a07\u00b76 and 4\u00b76\u00a0\u00b1\u00a04\u00b73, respectively) compared with the mild treatment group (3\u00b77\u00a0\u00b1\u00a03\u00b70 and 1\u00b78\u00a0\u00b1\u00a01\u00b78, respectively, both <jats:italic>P\u00a0<\/jats:italic>&lt;<jats:italic>\u00a0<\/jats:italic>0\u00b7001) or the short\u2010term group (9\u00b71\u00a0\u00b1\u00a05\u00b75 and 3\u00b77\u00a0\u00b1\u00a03\u00b71, respectively, both <jats:italic>P\u00a0<\/jats:italic>&lt;<jats:italic>\u00a0<\/jats:italic>0\u00b7001). Moreover, the total gonadotrophin used was also the highest in the LPS group. No significant differences were identified in the implantation rate (35\u00b75% <jats:italic>vs<\/jats:italic> 34\u00b78%, <jats:italic>P\u00a0<\/jats:italic>&gt;<jats:italic>\u00a0<\/jats:italic>0\u00b705), pregnancy rate (46\u00b72% <jats:italic>vs<\/jats:italic> 43\u00b77%, <jats:italic>P\u00a0<\/jats:italic>&gt;<jats:italic>\u00a0<\/jats:italic>0\u00b705) or live birth and ongoing pregnancy rate (44\u00b74% <jats:italic>vs<\/jats:italic> 41\u00b77%, <jats:italic>P\u00a0<\/jats:italic>&gt;<jats:italic>\u00a0<\/jats:italic>0\u00b705) per frozen\u2010thawed embryo transfer (FET) cycle in the LPS and mild treatment groups, respectively. However, the LPS protocol achieved a higher implantation rate (35\u00b75% <jats:italic>vs<\/jats:italic> 31\u00b78%, <jats:italic>P\u00a0<\/jats:italic>=<jats:italic>\u00a0<\/jats:italic>0\u00b7012), pregnancy rate (46\u00b72% <jats:italic>vs<\/jats:italic> 41\u00b79%, <jats:italic>P\u00a0<\/jats:italic>=<jats:italic>\u00a0<\/jats:italic>0\u00b7041), and live birth and ongoing pregnancy rate (44\u00b74% <jats:italic>vs<\/jats:italic> 39\u00b72%, <jats:italic>P\u00a0<\/jats:italic>=<jats:italic>\u00a0<\/jats:italic>0\u00b7012) compared with the short\u2010term protocol. Neonatal outcomes in the LPS group were similar to the other two groups.<\/jats:p><\/jats:sec><jats:sec><jats:title>Conclusions<\/jats:title><jats:p>The available data suggest that LPS is a feasible strategy for infertility treatment and complements the available follicular\u2010phase ovarian stimulation strategies.<\/jats:p><\/jats:sec>","DOI":"10.1111\/cen.12983","type":"journal-article","created":{"date-parts":[[2015,11,25]],"date-time":"2015-11-25T07:56:50Z","timestamp":1448438210000},"page":"720-728","source":"Crossref","is-referenced-by-count":82,"title":["Luteal\u2010phase ovarian stimulation <i>vs<\/i> conventional ovarian stimulation in patients with normal ovarian reserve treated for IVF: a large retrospective cohort study"],"prefix":"10.1111","volume":"84","author":[{"given":"Ningling","family":"Wang","sequence":"first","affiliation":[{"name":"Department of Assisted Reproduction Shanghai Ninth People's Hospital Shanghai Jiaotong University School of Medicine Shanghai 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