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This study compares the morphometric changes of the left and right oviducts in alpaca during the follicular phase. Five oviducts (<jats:italic>n<\/jats:italic>\u2009=\u200905), from adult alpacas with dominant follicle in the right ovary were recovered, dissected, and processed by histological technique with H&amp;E and PAS stain for measurement of morphometric parameters and cell characteristics, respectively. Also, a 3D image reconstruction was performed (by <jats:sc>reconstruct<\/jats:sc> software). Resin moulds (polyurethane PU4ii) were applied for visualization of oviductal lumen. The multivariable data of parameters were analysed with ANOVA and principal component analysis (PCA). The histomorphometric parameters of left and right oviducts did not show statistically significant differences (<jats:italic>p<\/jats:italic>\u2009\u2265\u20090.05), although PCA showed morphometric differences between regions of the oviduct. No differences were observed between the 3D reconstruction of the left and right oviducts, as well as in the luminal spaces examined in the resin moulds. In conclusion, the histomorphometry of the oviduct is not affected by its location on either the left or right side; therefore, it cannot explain why 98% of foetuses implant in the left uterus.<\/jats:p>","DOI":"10.1111\/ahe.12924","type":"journal-article","created":{"date-parts":[[2023,5,4]],"date-time":"2023-05-04T05:41:02Z","timestamp":1683178862000},"page":"673-683","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":1,"title":["Histomorphometric comparison of left and right oviduct structure from alpaca (<i>Vicugna pacos<\/i>)"],"prefix":"10.1111","volume":"52","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-7233-6772","authenticated-orcid":false,"given":"Katherine","family":"S\u00e1nchez\u2010Caycho","sequence":"first","affiliation":[{"name":"Histology and Cytology Laboratory, Centro de Investigaci\u00f3n en Tecnolog\u00eda de Embriones (CIETE) Universidad Nacional Agraria La Molina  Lima Peru"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Renzo","family":"Ch\u00e1vez\u2010Quispe","sequence":"additional","affiliation":[{"name":"Histology and Cytology Laboratory, Centro de Investigaci\u00f3n en Tecnolog\u00eda de Embriones (CIETE) Universidad Nacional Agraria La Molina  Lima Peru"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-7171-1991","authenticated-orcid":false,"given":"Edwin","family":"Mellisho","sequence":"additional","affiliation":[{"name":"Histology and Cytology Laboratory, Centro de Investigaci\u00f3n en Tecnolog\u00eda de Embriones (CIETE) Universidad Nacional Agraria La Molina  Lima Peru"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"311","published-online":{"date-parts":[[2023,5,3]]},"reference":[{"issue":"3","key":"e_1_2_9_2_1","first-page":"743","article-title":"The mammalian oviductal epithelium: Regional variations in cytological and functional aspects of the oviductal secretory cells","volume":"11","author":"Abe H.","year":"1996","journal-title":"Histology and Histopathology"},{"key":"e_1_2_9_3_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.rbmo.2020.06.007"},{"key":"e_1_2_9_4_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.aanat.2014.02.007"},{"key":"e_1_2_9_5_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.jevs.2011.08.001"},{"key":"e_1_2_9_6_1","doi-asserted-by":"publisher","DOI":"10.1111\/j.1439\u20100531.2008.01125.x"},{"key":"e_1_2_9_7_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.smallrumres.2005.09.023"},{"key":"e_1_2_9_8_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.anireprosci.2009.07.008"},{"key":"e_1_2_9_9_1","doi-asserted-by":"publisher","DOI":"10.1095\/biolreprod.116.140632"},{"key":"e_1_2_9_10_1","doi-asserted-by":"publisher","DOI":"10.1111\/j.1439\u20100531.2012.02070.x"},{"key":"e_1_2_9_11_1","doi-asserted-by":"publisher","DOI":"10.3390\/biology7010015"},{"key":"e_1_2_9_12_1","doi-asserted-by":"publisher","DOI":"10.1016\/0378\u20104320(95)01465\u20109"},{"key":"e_1_2_9_13_1","doi-asserted-by":"publisher","DOI":"10.1016\/0378\u20104320(93)90096\u2010A"},{"key":"e_1_2_9_14_1","unstructured":"Burkitt M. 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