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Implantation, clinical pregnancy, spontaneous abortion, and live delivery rates were calculated. The incidence of term delivery, preterm delivery, low birth weight, term low birth weight, and very low birth weight were also recorded. To detect a 10% difference in the implantation rate, a minimum sample size of at least 415 transfer cycles in each group was estimated.<\/jats:p><\/jats:sec><jats:sec><jats:title>Results<\/jats:title><jats:p>The study included data from 918 fresh and 1273 frozen\u2010thawed cycles. Patients in both groups were of similar age and there was no difference in the grading of blastocysts. No differences were observed in the implantation (37.3% vs 37.7%), clinical pregnancy (50.2% vs 49.4%), spontaneous abortion (7.3% vs 9.3%), and live delivery (42.9% vs 40.6%) rates of the two groups. A sub\u2010analysis of all live singleton and twin deliveries revealed no difference in perinatal outcomes between the two techniques.<\/jats:p><\/jats:sec><jats:sec><jats:title>Conclusions<\/jats:title><jats:p>The present study demonstrated equivalent singleton pregnancy and perinatal outcomes when comparing frozen\u2010thawed and fresh blastocyst transfer procedures.<\/jats:p><\/jats:sec>","DOI":"10.1016\/j.ijgo.2016.04.007","type":"journal-article","created":{"date-parts":[[2016,6,27]],"date-time":"2016-06-27T20:52:33Z","timestamp":1467060753000},"page":"96-100","update-policy":"https:\/\/doi.org\/10.1016\/elsevier_cm_policy","source":"Crossref","is-referenced-by-count":43,"title":["Comparison of perinatal outcomes following fresh and frozen\u2010thawed blastocyst transfer"],"prefix":"10.1002","volume":"135","author":[{"given":"Nigel","family":"Pereira","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Allison C.","family":"Petrini","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jovana P.","family":"Lekovich","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Glenn L.","family":"Schattman","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Zev","family":"Rosenwaks","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"311","published-online":{"date-parts":[[2016,12,2]]},"reference":[{"key":"e_1_2_6_2_2","doi-asserted-by":"publisher","DOI":"10.1016\/j.fertnstert.2014.04.048"},{"key":"e_1_2_6_3_2","unstructured":"Center for Disease Control and Prevention.Assisted Reproductive Technology (ART)http:\/\/www.cdc.gov\/art Accessed November 4 2014"},{"key":"e_1_2_6_4_2","doi-asserted-by":"publisher","DOI":"10.1016\/j.fertnstert.2014.04.018"},{"key":"e_1_2_6_5_2","doi-asserted-by":"publisher","DOI":"10.1016\/j.fertnstert.2014.05.027"},{"key":"e_1_2_6_6_2","doi-asserted-by":"publisher","DOI":"10.1016\/j.fertnstert.2014.05.019"},{"key":"e_1_2_6_7_2","doi-asserted-by":"publisher","DOI":"10.1016\/j.fertnstert.2012.09.044"},{"key":"e_1_2_6_8_2","doi-asserted-by":"publisher","DOI":"10.1097\/AOG.0b013e31822be65f"},{"key":"e_1_2_6_9_2","doi-asserted-by":"publisher","DOI":"10.1016\/j.fertnstert.2012.03.028"},{"key":"e_1_2_6_10_2","doi-asserted-by":"publisher","DOI":"10.1016\/j.fertnstert.2012.03.047"},{"key":"e_1_2_6_11_2","doi-asserted-by":"publisher","DOI":"10.1016\/j.fertnstert.2014.05.024"},{"key":"e_1_2_6_12_2","doi-asserted-by":"publisher","DOI":"10.1097\/AOG.0b013e3182255999"},{"key":"e_1_2_6_13_2","doi-asserted-by":"publisher","DOI":"10.1016\/0029-7844(95)00386-X"},{"key":"e_1_2_6_14_2","doi-asserted-by":"publisher","DOI":"10.1007\/s10815-015-0434-1"},{"key":"e_1_2_6_15_2","first-page":"378","volume-title":"In vitro culture of human blastocysts","author":"Gardner D.K.","year":"1999"},{"key":"e_1_2_6_16_2","doi-asserted-by":"publisher","DOI":"10.1016\/j.theriogenology.2006.09.014"},{"key":"e_1_2_6_17_2","doi-asserted-by":"publisher","DOI":"10.1016\/j.fertnstert.2013.09.025"},{"key":"e_1_2_6_18_2","doi-asserted-by":"publisher","DOI":"10.1016\/j.fertnstert.2014.01.046"},{"issue":"6","key":"e_1_2_6_19_2","doi-asserted-by":"crossref","first-page":"1615\u201321.e1","DOI":"10.1016\/j.fertnstert.2013.08.044","article-title":"Obstetric and perinatal outcomes in singleton pregnancies resulting from the transfer of blastocyst\u2010stage versus cleavage\u2010stage embryos generated through in vitro fertilization treatment: a systematic review and meta\u2010analysis","volume":"100","author":"Maheshwari A.","year":"2013","journal-title":"Fertil Steril"},{"key":"e_1_2_6_20_2","doi-asserted-by":"publisher","DOI":"10.1016\/S0015-0282(01)02018-0"},{"key":"e_1_2_6_21_2","doi-asserted-by":"publisher","DOI":"10.1016\/j.fertnstert.2011.03.022"},{"key":"e_1_2_6_22_2","doi-asserted-by":"publisher","DOI":"10.1093\/humrep\/16.2.221"},{"key":"e_1_2_6_23_2","doi-asserted-by":"publisher","DOI":"10.1016\/S1472-6483(10)61853-6"},{"key":"e_1_2_6_24_2","doi-asserted-by":"publisher","DOI":"10.1093\/molehr\/gah150"},{"key":"e_1_2_6_25_2","doi-asserted-by":"publisher","DOI":"10.1016\/j.fertnstert.2011.02.059"},{"key":"e_1_2_6_26_2","doi-asserted-by":"publisher","DOI":"10.1055\/s-0028-1103027"}],"container-title":["International Journal of Gynecology &amp; 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