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Follicular dynamics was monitored every second day from 40\u00a0days before and other 40 after delivery by transrectal sonography and by plasma steroids concentrations. Seven out of eight (87.5%) of gestating females presented ovarian follicular activity under progesterone levels &gt;3\u00a0nmol\/l with maximum follicular size of 8.42\u00a0\u00b1\u00a00.83\u00a0mm from days 23 to 1 before delivery. After delivery, all females have follicular wave development from day 0 to 38, with larger follicular size and longer follicular wave phases and interwave interval when compared with pre\u2010partum data. During post\u2010partum period, there was a close relationship between follicle size and estradiol\u201017<jats:italic>\u03b2<\/jats:italic> concentration, with <jats:italic>r<\/jats:italic>\u00a0=\u00a00.69 at the beginning of growth phase and <jats:italic>r<\/jats:italic>\u00a0=\u00a00.86 in association with the largest dominant follicle. Plasma estradiol\u201017<jats:italic>\u03b2<\/jats:italic> concentration varied from 11.92 to 198.55 pmol\/l. Plasma estrone sulfate, free estrone and progesterone returned to baseline concentrations during peripartal period and remained basal thereafter. The results described follicular activity during late gestation and early post\u2010partum period. These findings provide relevant information to understand physiological changes occurring during this reproductive key period in seasonal breeders with long gestation duration as New and Old World camelids.<\/jats:p>","DOI":"10.1111\/rda.12462","type":"journal-article","created":{"date-parts":[[2014,12,22]],"date-time":"2014-12-22T06:38:16Z","timestamp":1419230296000},"page":"129-134","source":"Crossref","is-referenced-by-count":3,"title":["Ovarian Follicular Activity During Late Gestation and Postpartum in Guanaco (<i><scp>L<\/scp>ama guanicoe<\/i>)"],"prefix":"10.1111","volume":"50","author":[{"given":"JL","family":"Riveros","sequence":"first","affiliation":[{"name":"Departamento de Ciencias Animales Facultad de Agronom\u00eda e Ingenier\u00eda Forestal Pontificia Universidad Cat\u00f3lica de Chile Santiago Chile"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"G","family":"Schuler","sequence":"additional","affiliation":[{"name":"Clinic for Obstetrics, Gynecology and Andrology of Large and Small Animals Justus\u2010Liebig\u2010University Giessen Giessen Germany"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"B","family":"Urquieta","sequence":"additional","affiliation":[{"name":"Departamento de Ciencias Biol\u00f3gicas Animales Facultad de Ciencias Veterinarias y Pecuarias Universidad de Chile Santiago Chile"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"B","family":"Hoffmann","sequence":"additional","affiliation":[{"name":"Clinic for Obstetrics, Gynecology and Andrology of Large and Small Animals Justus\u2010Liebig\u2010University Giessen Giessen Germany"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"C","family":"Bonacic","sequence":"additional","affiliation":[{"name":"Departamento de Ecosistemas y Medio Ambiente Facultad de Agronom\u00eda e Ingenier\u00eda Forestal Pontificia Universidad Cat\u00f3lica de Chile Santiago Chile"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"311","published-online":{"date-parts":[[2014,12,22]]},"reference":[{"key":"e_1_2_5_2_1","doi-asserted-by":"publisher","DOI":"10.1016\/S0378-4320(97)00084-5"},{"key":"e_1_2_5_3_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.anireprosci.2004.06.003"},{"key":"e_1_2_5_4_1","doi-asserted-by":"publisher","DOI":"10.1530\/jrf.0.0900535"},{"key":"e_1_2_5_5_1","first-page":"379","article-title":"Follicular dynamics in Vicugna vicugna","volume":"55","author":"Ag\u00fcero A","year":"2001","journal-title":"Theriogenology"},{"key":"e_1_2_5_6_1","doi-asserted-by":"publisher","DOI":"10.1016\/0378-4320(93)90096-A"},{"key":"e_1_2_5_7_1","doi-asserted-by":"publisher","DOI":"10.1016\/0093-691X(91)90385-Q"},{"key":"e_1_2_5_8_1","doi-asserted-by":"publisher","DOI":"10.1016\/0093-691X(95)00265-A"},{"key":"e_1_2_5_9_1","doi-asserted-by":"publisher","DOI":"10.1016\/S0378-4320(01)00173-7"},{"key":"e_1_2_5_10_1","unstructured":"ChenBX YuenZX 1979:Pregnancy diagnosis by rectal examination. 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