<?xml version="1.0" encoding="ISO-8859-1"?><article xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<front>
<journal-meta>
<journal-id>2007-1124</journal-id>
<journal-title><![CDATA[Revista mexicana de ciencias pecuarias]]></journal-title>
<abbrev-journal-title><![CDATA[Rev. mex. de cienc. pecuarias]]></abbrev-journal-title>
<issn>2007-1124</issn>
<publisher>
<publisher-name><![CDATA[Instituto Nacional de Investigaciones Forestales, Agrícolas y Pecuarias]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S2007-11242023000300610</article-id>
<article-id pub-id-type="doi">10.22319/rmcp.v14i3.6309</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Sincronización de estros en ovejas mediante protocolo de 6 días con CIDR de primera, segunda y tercera reutilización]]></article-title>
<article-title xml:lang="en"><![CDATA[Estrus synchronization in ewes with a six-day protocol using new, second-use, third-use and fourth-use CIDR devices]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[López-García]]></surname>
<given-names><![CDATA[Susana]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Sánchez-Torres Esqueda]]></surname>
<given-names><![CDATA[María Teresa]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Cordero-Mora]]></surname>
<given-names><![CDATA[José Luis]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Figueroa-Velasco]]></surname>
<given-names><![CDATA[José Luis]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Martínez-Aispuro]]></surname>
<given-names><![CDATA[José Alfredo]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Salinas Ríos]]></surname>
<given-names><![CDATA[Teódulo]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Colegio de Postgraduados  ]]></institution>
<addr-line><![CDATA[Texcoco Estado de México]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidad Autónoma Benito Juárez de Oaxaca Facultad de Medicina Veterinaria y Zootecnia ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>México</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>09</month>
<year>2023</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>09</month>
<year>2023</year>
</pub-date>
<volume>14</volume>
<numero>3</numero>
<fpage>610</fpage>
<lpage>621</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S2007-11242023000300610&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S2007-11242023000300610&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S2007-11242023000300610&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen El objetivo del estudio fue comparar el efecto de dispositivos intravaginales liberadores de progesterona natural (CIDR) nuevos y reutilizados en protocolos de 6 días sobre el desempeño reproductivo y en las concentraciones de progesterona en suero sanguíneo de ovejas multíparas. Un total de 172 ovejas con peso corporal promedio de 59 kg se distribuyeron al azar en cuatro tratamientos: CIDR1 (grupo testigo con dispositivos nuevos) y CIDR2, CIDR3, CIDR4 (con 6, 12 y 18 días de uso, respectivamente). En cuanto al inicio de estro, hubo diferencia (P&#8804;0.05) únicamente entre el tratamiento con CIDR nuevos (40 ± 10 h) y CIDR de segundo uso (31 ± 9 h). En las variables presencia de estro, porcentaje de gestación, porcentaje de fertilidad y tipo de parto no se obtuvieron diferencias significativas (P&gt;0.05) entre tratamientos. La presencia de estro osciló entre 93 y 100 %, el valor promedio de gestación fue 80.8 %, 80.2 % para fertilidad y 1.26 para el índice de prolificidad. Los porcentajes de partos sencillos fueron mayores (P&#8804;0.05) a los partos dobles en los cuatro tratamientos. Se concluye que el uso de CIDR en protocolos de 6 días permite que los dispositivos sean utilizados hasta por cuatro ocasiones con buenos resultados.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract Estrus synchronization( is a vital strategy in sheep production and is accomplished most often via controlled internal drug release (CIDR) devices. Reuse of CIDR devices can reduce operating costs and ewe exposure to progesterone (P4), but remains controversial. A comparison was made of the effects of new and reused natural progesterone-releasing intravaginal (CIDR) devices in six-day protocols on reproductive performance variables and blood serum progesterone concentrations in multiparous ewes. A total of 172 sheep (average body weight = 59 kg) were randomly distributed into four treatments: CIDR1 (control group, new devices), CIDR2 (second-use), CIDR3 (third-use) and CIDR4 (fourth-use). The variables ewes in estrus, pregnancy rate, fertility rate and parturition type did not differ (P&gt;0.05) between treatments. Estrus onset was later (P&#8804;0.05) in CIDR1 (40 ± 10 h) than in CIDR2 (31 ± 9 h). Ewes in estrus ranged from 93 to 100 %, average pregnancy rate was 80.8 %, average fertility rate was 80.2 % and the prolificacy index was 1.26. The single delivery rate was higher (P&#8804;0.05) than the double delivery rate in all four treatments. Intravaginal CIDR devices can be used in ewes up to four times in six-day estrus synchronization protocols without affecting reproductive variables.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[CIDR reutilizados]]></kwd>
<kwd lng="es"><![CDATA[Ovejas]]></kwd>
<kwd lng="es"><![CDATA[Variables reproductivas]]></kwd>
<kwd lng="en"><![CDATA[CIDR reuse]]></kwd>
<kwd lng="en"><![CDATA[Sheep]]></kwd>
<kwd lng="en"><![CDATA[Reproductive variables]]></kwd>
</kwd-group>
</article-meta>
</front><back>
<ref-list>
<ref id="B1">
<label>1</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Kuru]]></surname>
<given-names><![CDATA[M]]></given-names>
</name>
<name>
<surname><![CDATA[Kuru]]></surname>
<given-names><![CDATA[BB]]></given-names>
</name>
<name>
<surname><![CDATA[Kacar]]></surname>
<given-names><![CDATA[C]]></given-names>
</name>
<name>
<surname><![CDATA[Can Demir]]></surname>
<given-names><![CDATA[MC]]></given-names>
</name>
<name>
<surname><![CDATA[Cetin]]></surname>
<given-names><![CDATA[N.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Effect of oestrus synchronization with different lengths of progesterone-impregnated sponges and equine chorionic gonadotropin on reproductive efficiency in Romanov ewes during the non-breeding season]]></article-title>
<source><![CDATA[Acta Vet Brno]]></source>
<year>2022</year>
<numero>91</numero>
<issue>91</issue>
<page-range>243-50</page-range></nlm-citation>
</ref>
<ref id="B2">
<label>2</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Martínez-Ros]]></surname>
<given-names><![CDATA[P]]></given-names>
</name>
<name>
<surname><![CDATA[Astiz]]></surname>
<given-names><![CDATA[S]]></given-names>
</name>
<name>
<surname><![CDATA[Garcia&#8208;Rosello]]></surname>
<given-names><![CDATA[E]]></given-names>
</name>
<name>
<surname><![CDATA[Rios&#8208;Abellan]]></surname>
<given-names><![CDATA[A]]></given-names>
</name>
<name>
<surname><![CDATA[Gonzalez&#8208;Bulnes]]></surname>
<given-names><![CDATA[A.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Onset of estrus and preovulatory LH surge and ovulatory efficiency in sheep after short&#8208;term treatments with progestagen&#8208;sponges and progesterone&#8208;CIDRs]]></article-title>
<source><![CDATA[Reprod Domest Anim]]></source>
<year>2019</year>
<numero>54</numero>
<issue>54</issue>
<page-range>408-11</page-range></nlm-citation>
</ref>
<ref id="B3">
<label>3</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Swelum]]></surname>
<given-names><![CDATA[AA]]></given-names>
</name>
<name>
<surname><![CDATA[Saadeldin]]></surname>
<given-names><![CDATA[IM]]></given-names>
</name>
<name>
<surname><![CDATA[Moumen]]></surname>
<given-names><![CDATA[AF]]></given-names>
</name>
<name>
<surname><![CDATA[Ali]]></surname>
<given-names><![CDATA[MA]]></given-names>
</name>
<name>
<surname><![CDATA[Ba-Awadh]]></surname>
<given-names><![CDATA[H]]></given-names>
</name>
<name>
<surname><![CDATA[Alowaimer]]></surname>
<given-names><![CDATA[AN.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Efficacy of using previously used controlled internal drug release (CIDR) insert on the reproductive performance, hormone profiles and economic measures of sheep]]></article-title>
<source><![CDATA[Reprod Domest Anim]]></source>
<year>2018</year>
<numero>53</numero>
<issue>53</issue>
<page-range>1114-22</page-range></nlm-citation>
</ref>
<ref id="B4">
<label>4</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Samartzi]]></surname>
<given-names><![CDATA[F]]></given-names>
</name>
<name>
<surname><![CDATA[Theodosiadou]]></surname>
<given-names><![CDATA[EK]]></given-names>
</name>
<name>
<surname><![CDATA[Vainas]]></surname>
<given-names><![CDATA[E]]></given-names>
</name>
<name>
<surname><![CDATA[Saratsi]]></surname>
<given-names><![CDATA[A]]></given-names>
</name>
<name>
<surname><![CDATA[Tsiligianni]]></surname>
<given-names><![CDATA[T]]></given-names>
</name>
<name>
<surname><![CDATA[Rekkas]]></surname>
<given-names><![CDATA[CA.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Plasminogen activator activity and plasminogen activator inhibition in the uterus of ewes after the induction of oestrus synchronization or superovulation, involving eCG]]></article-title>
<source><![CDATA[Small Ruminant Res]]></source>
<year>2022</year>
<numero>210</numero>
<issue>210</issue>
<page-range>106672</page-range></nlm-citation>
</ref>
<ref id="B5">
<label>5</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Skliarov]]></surname>
<given-names><![CDATA[P]]></given-names>
</name>
<name>
<surname><![CDATA[Pérez]]></surname>
<given-names><![CDATA[C]]></given-names>
</name>
<name>
<surname><![CDATA[Petrusha]]></surname>
<given-names><![CDATA[V]]></given-names>
</name>
<name>
<surname><![CDATA[Fedorenko]]></surname>
<given-names><![CDATA[S]]></given-names>
</name>
<name>
<surname><![CDATA[Bilyi]]></surname>
<given-names><![CDATA[D.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Induction and synchronization of oestrus in sheep and goats]]></article-title>
<source><![CDATA[J Cent Eur Agric]]></source>
<year>2021</year>
<volume>22</volume>
<numero>1</numero>
<issue>1</issue>
<page-range>39-53</page-range></nlm-citation>
</ref>
<ref id="B6">
<label>6</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Pinna]]></surname>
<given-names><![CDATA[AE]]></given-names>
</name>
<name>
<surname><![CDATA[Brandão]]></surname>
<given-names><![CDATA[FZ]]></given-names>
</name>
<name>
<surname><![CDATA[Cavalcanti]]></surname>
<given-names><![CDATA[AS]]></given-names>
</name>
<name>
<surname><![CDATA[Borges]]></surname>
<given-names><![CDATA[AM]]></given-names>
</name>
<name>
<surname><![CDATA[Souza]]></surname>
<given-names><![CDATA[JMG]]></given-names>
</name>
<name>
<surname><![CDATA[Fonseca]]></surname>
<given-names><![CDATA[JF.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Reproductive parameters of Santa Inês ewes submitted to short&#8208;term treatment with re&#8208;used progesterone devices]]></article-title>
<source><![CDATA[Arq Bras Med Vet Zootec]]></source>
<year>2012</year>
<volume>64</volume>
<numero>2</numero>
<issue>2</issue>
<page-range>333-40</page-range></nlm-citation>
</ref>
<ref id="B7">
<label>7</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Ungerfeld]]></surname>
<given-names><![CDATA[R.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[The induction of oestrus in ewes during the non-breeding season using pre-used CIDRs and oestradiol-17&#946; treatment]]></article-title>
<source><![CDATA[Small Ruminant Res]]></source>
<year>2009</year>
<numero>84</numero>
<issue>84</issue>
<page-range>129-31</page-range></nlm-citation>
</ref>
<ref id="B8">
<label>8</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Cox]]></surname>
<given-names><![CDATA[JF]]></given-names>
</name>
<name>
<surname><![CDATA[Allende]]></surname>
<given-names><![CDATA[R]]></given-names>
</name>
<name>
<surname><![CDATA[Lara]]></surname>
<given-names><![CDATA[E]]></given-names>
</name>
<name>
<surname><![CDATA[Leiva]]></surname>
<given-names><![CDATA[A]]></given-names>
</name>
<name>
<surname><![CDATA[Díaz]]></surname>
<given-names><![CDATA[T]]></given-names>
</name>
<name>
<surname><![CDATA[Dorado]]></surname>
<given-names><![CDATA[J]]></given-names>
</name>
<name>
<surname><![CDATA[Saravia]]></surname>
<given-names><![CDATA[F.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Follicular dynamics, interval to ovulation and fertility after AI in short-term progesterone and PGF2&#945; oestrous synchronization protocol in Sheep]]></article-title>
<source><![CDATA[Reprod Domest Anim]]></source>
<year>2012</year>
<numero>47</numero>
<issue>47</issue>
<page-range>946-51</page-range></nlm-citation>
</ref>
<ref id="B9">
<label>9</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Bazzan]]></surname>
<given-names><![CDATA[AP]]></given-names>
</name>
<name>
<surname><![CDATA[Tedesco]]></surname>
<given-names><![CDATA[D]]></given-names>
</name>
<name>
<surname><![CDATA[Menestrina]]></surname>
<given-names><![CDATA[AL]]></given-names>
</name>
<name>
<surname><![CDATA[Machado]]></surname>
<given-names><![CDATA[SA]]></given-names>
</name>
<name>
<surname><![CDATA[da Rocha]]></surname>
<given-names><![CDATA[RX]]></given-names>
</name>
<name>
<surname><![CDATA[Bragança]]></surname>
<given-names><![CDATA[JFM.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Reutilização de um dispositivo intravaginal com progesterona na indução e sincronização do estro ovino]]></article-title>
<source><![CDATA[RPCV]]></source>
<year>2013</year>
<numero>108</numero>
<issue>108</issue>
<page-range>143-6</page-range></nlm-citation>
</ref>
<ref id="B10">
<label>10</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Biehl]]></surname>
<given-names><![CDATA[MV]]></given-names>
</name>
<name>
<surname><![CDATA[Ferraz]]></surname>
<given-names><![CDATA[JMVC]]></given-names>
</name>
<name>
<surname><![CDATA[Barroso]]></surname>
<given-names><![CDATA[JPR]]></given-names>
</name>
<name>
<surname><![CDATA[Susin]]></surname>
<given-names><![CDATA[I]]></given-names>
</name>
<name>
<surname><![CDATA[Ferreira]]></surname>
<given-names><![CDATA[EM]]></given-names>
</name>
<name>
<surname><![CDATA[Polizel]]></surname>
<given-names><![CDATA[DM]]></given-names>
</name>
<name>
<surname><![CDATA[Pires]]></surname>
<given-names><![CDATA[AV.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[The reused progesterone device has the same effect on short or long estrus synchronization protocols in tropical sheep]]></article-title>
<source><![CDATA[Trop Anim Health Prod]]></source>
<year>2019</year>
<numero>51</numero>
<issue>51</issue>
<page-range>1545-9</page-range></nlm-citation>
</ref>
<ref id="B11">
<label>11</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Vilariño]]></surname>
<given-names><![CDATA[M]]></given-names>
</name>
<name>
<surname><![CDATA[Rubianes]]></surname>
<given-names><![CDATA[E]]></given-names>
</name>
<name>
<surname><![CDATA[Menchaca]]></surname>
<given-names><![CDATA[A.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Ovarian responses and pregnancy rate with previously used intravaginal progesterone releasing devices for fixed-time artificial insemination in sheep]]></article-title>
<source><![CDATA[Theriogenology]]></source>
<year>2013</year>
<numero>79</numero>
<issue>79</issue>
<page-range>206-310</page-range></nlm-citation>
</ref>
<ref id="B12">
<label>12</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Silva]]></surname>
<given-names><![CDATA[T]]></given-names>
</name>
<name>
<surname><![CDATA[Rocha]]></surname>
<given-names><![CDATA[JF]]></given-names>
</name>
<name>
<surname><![CDATA[Machado]]></surname>
<given-names><![CDATA[S]]></given-names>
</name>
<name>
<surname><![CDATA[Rocha]]></surname>
<given-names><![CDATA[R]]></given-names>
</name>
<name>
<surname><![CDATA[Bennemann]]></surname>
<given-names><![CDATA[PE]]></given-names>
</name>
<name>
<surname><![CDATA[Bragança]]></surname>
<given-names><![CDATA[JF.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[A reutilização de um dispositivo intravaginal (CIDR-G) nas manifestações de estro e prenhez da espécie ovina]]></article-title>
<source><![CDATA[Encicl Biosf]]></source>
<year>2014</year>
<volume>10</volume>
<numero>18</numero>
<issue>18</issue>
<page-range>40-5</page-range></nlm-citation>
</ref>
<ref id="B13">
<label>13</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[López-García]]></surname>
<given-names><![CDATA[S]]></given-names>
</name>
<name>
<surname><![CDATA[Sánchez-Torres]]></surname>
<given-names><![CDATA[MT]]></given-names>
</name>
<name>
<surname><![CDATA[Cordero-Mora]]></surname>
<given-names><![CDATA[JL]]></given-names>
</name>
<name>
<surname><![CDATA[Figueroa-Velasco]]></surname>
<given-names><![CDATA[JL]]></given-names>
</name>
<name>
<surname><![CDATA[Martínez-Aispuro]]></surname>
<given-names><![CDATA[JA]]></given-names>
</name>
<name>
<surname><![CDATA[García-Cué]]></surname>
<given-names><![CDATA[JL]]></given-names>
</name>
<name>
<surname><![CDATA[Martínez-Cruz]]></surname>
<given-names><![CDATA[I]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Estrous sinchronization in sheep with reused progesterone devices and eCG]]></article-title>
<source><![CDATA[Rev Bras Zoot]]></source>
<year>2021</year>
<numero>50</numero>
<issue>50</issue>
</nlm-citation>
</ref>
<ref id="B14">
<label>14</label><nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[García]]></surname>
<given-names><![CDATA[E.]]></given-names>
</name>
</person-group>
<source><![CDATA[Modificaciones al sistema de clasificación climática de Köppen (para adaptarlo a las condiciones de la República Mexicana)]]></source>
<year>2004</year>
<edition>5ª</edition>
<publisher-loc><![CDATA[México ]]></publisher-loc>
<publisher-name><![CDATA[Instituto de Geografía. UNAM]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B15">
<label>15</label><nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Ley Federal de Sanidad Animal]]></article-title>
<source><![CDATA[Diario Oficial de la Federación]]></source>
<year>2012</year>
</nlm-citation>
</ref>
<ref id="B16">
<label>16</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Ochoa]]></surname>
<given-names><![CDATA[MLI]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Especificaciones técnicas para la producción, cuidado y uso de los animales de laboratorio]]></article-title>
<source><![CDATA[Diario Oficial de la Federación]]></source>
<year></year>
<publisher-loc><![CDATA[México ]]></publisher-loc>
</nlm-citation>
</ref>
<ref id="B17">
<label>17</label><nlm-citation citation-type="">
<collab>SAS. Statistical Analysis System</collab>
<source><![CDATA[SAS Institute Incorporation]]></source>
<year>2010</year>
<publisher-loc><![CDATA[Cary, NC, USA ]]></publisher-loc>
</nlm-citation>
</ref>
<ref id="B18">
<label>18</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Nakafeero]]></surname>
<given-names><![CDATA[A]]></given-names>
</name>
<name>
<surname><![CDATA[Hassen]]></surname>
<given-names><![CDATA[A]]></given-names>
</name>
<name>
<surname><![CDATA[Lehloenya]]></surname>
<given-names><![CDATA[KC.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Investigation of ram effect and eCG usage in progesterone based oestrous synchronization protocols on fertility of ewes following fixed time artificial insemination]]></article-title>
<source><![CDATA[Small Ruminant Res]]></source>
<year>2020</year>
<numero>183</numero>
<issue>183</issue>
<page-range>10603</page-range></nlm-citation>
</ref>
<ref id="B19">
<label>19</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Wildeus]]></surname>
<given-names><![CDATA[S.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Current concepts in synchronization of estrus: sheep and goats]]></article-title>
<source><![CDATA[J Anim Sci]]></source>
<year>2000</year>
<numero>77</numero>
<issue>77</issue>
<page-range>1-14</page-range></nlm-citation>
</ref>
<ref id="B20">
<label>20</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Atli]]></surname>
<given-names><![CDATA[MO]]></given-names>
</name>
<name>
<surname><![CDATA[Akbal&#305;k]]></surname>
<given-names><![CDATA[ME]]></given-names>
</name>
<name>
<surname><![CDATA[Kose]]></surname>
<given-names><![CDATA[M]]></given-names>
</name>
<name>
<surname><![CDATA[Alak]]></surname>
<given-names><![CDATA[I]]></given-names>
</name>
<name>
<surname><![CDATA[Atli]]></surname>
<given-names><![CDATA[Z]]></given-names>
</name>
<name>
<surname><![CDATA[Hitit]]></surname>
<given-names><![CDATA[M.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Expression pattern and cellular localization of two critical non-nuclear progesterone receptors in the ovine corpus luteum during the estrous cycle and early pregnancy]]></article-title>
<source><![CDATA[Anim Reprod Sci]]></source>
<year>2022</year>
<numero>243</numero>
<issue>243</issue>
<page-range>107026</page-range></nlm-citation>
</ref>
<ref id="B21">
<label>21</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Casida]]></surname>
<given-names><![CDATA[LE]]></given-names>
</name>
<name>
<surname><![CDATA[Warwick]]></surname>
<given-names><![CDATA[EJ.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[The necessity of the corpus luteum for maintenance of pregnancy in the ewe]]></article-title>
<source><![CDATA[J Anim Sci]]></source>
<year>1945</year>
<numero>4</numero>
<issue>4</issue>
<page-range>34-46</page-range></nlm-citation>
</ref>
<ref id="B22">
<label>22</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Bragança]]></surname>
<given-names><![CDATA[JFM]]></given-names>
</name>
<name>
<surname><![CDATA[Oliveira Drissen]]></surname>
<given-names><![CDATA[R]]></given-names>
</name>
<name>
<surname><![CDATA[Abreu Machado]]></surname>
<given-names><![CDATA[S]]></given-names>
</name>
<name>
<surname><![CDATA[Bennemann]]></surname>
<given-names><![CDATA[PE]]></given-names>
</name>
<name>
<surname><![CDATA[Rocha]]></surname>
<given-names><![CDATA[RX.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Efficacy of the re-utilization of an ear implant impregnated with progestogen in estrus synchronization response and pregnancy in sheep]]></article-title>
<source><![CDATA[Trop Anim Health Prod]]></source>
<year>2019</year>
<numero>51</numero>
<issue>51</issue>
<page-range>1763-5</page-range></nlm-citation>
</ref>
<ref id="B23">
<label>23</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Silva Lombardo]]></surname>
<given-names><![CDATA[HN]]></given-names>
</name>
<name>
<surname><![CDATA[Santos Monteiro]]></surname>
<given-names><![CDATA[CA]]></given-names>
</name>
<name>
<surname><![CDATA[Delgado]]></surname>
<given-names><![CDATA[KF]]></given-names>
</name>
<name>
<surname><![CDATA[Pinna]]></surname>
<given-names><![CDATA[AE]]></given-names>
</name>
<name>
<surname><![CDATA[Vasconcelos]]></surname>
<given-names><![CDATA[COP]]></given-names>
</name>
<name>
<surname><![CDATA[Garcia-Nogueira]]></surname>
<given-names><![CDATA[LA]]></given-names>
</name>
<name>
<surname><![CDATA[Brandão]]></surname>
<given-names><![CDATA[FZ]]></given-names>
</name>
<name>
<surname><![CDATA[Balaro]]></surname>
<given-names><![CDATA[MFA.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Hormonal protocols for the synchronization and induction of synchronized estrus in dairy ewes kept under tropical conditions]]></article-title>
<source><![CDATA[Acta Scient Vet]]></source>
<year>2020</year>
<numero>48</numero>
<issue>48</issue>
<page-range>1751</page-range></nlm-citation>
</ref>
</ref-list>
</back>
</article>
