<?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>1794-4449</journal-id>
<journal-title><![CDATA[Revista Lasallista de Investigación]]></journal-title>
<abbrev-journal-title><![CDATA[Rev. Lasallista Investig.]]></abbrev-journal-title>
<issn>1794-4449</issn>
<publisher>
<publisher-name><![CDATA[Corporación Universitaria Lasallista]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S1794-44492021000200085</article-id>
<article-id pub-id-type="doi">10.22507/rli.v18n2a7</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Pre-sincronización con Progesterona para la Inducción de Ciclicidad en Vacas Bos taurus indicus en Periodo de Anestro Posparto]]></article-title>
<article-title xml:lang="en"><![CDATA[Presynchronization with Progesterone for Induction of Cyclicity in Bos Taurus Indicus Cows in Postpartum Anestrus Period]]></article-title>
<article-title xml:lang="pt"><![CDATA[Pré-sincronização com Progesterona para a Indução de Ciclicidade em Vacas Bos Taurus Indicus em Período de Anestro Pós-Parto]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Gomes]]></surname>
<given-names><![CDATA[Tiago Botelho]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Narváez]]></surname>
<given-names><![CDATA[Héctor Javier]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidade Estadual do Norte Fluminense Darcy Ribeiro Centro de Ciências e Tecnologias Agropecuárias Programa de Pós-graduação em Ciência Animal, Campos dos Goytacazes]]></institution>
<addr-line><![CDATA[Rio de Janeiro ]]></addr-line>
<country>Brasil</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidad de Santander Facultad de Ciencias Agrícolas y Veterinarias ]]></institution>
<addr-line><![CDATA[Bucaramanga ]]></addr-line>
<country>Colombia</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>12</month>
<year>2021</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>12</month>
<year>2021</year>
</pub-date>
<volume>18</volume>
<numero>2</numero>
<fpage>85</fpage>
<lpage>93</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_arttext&amp;pid=S1794-44492021000200085&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_abstract&amp;pid=S1794-44492021000200085&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_pdf&amp;pid=S1794-44492021000200085&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen  Objetivo. Este trabajo tuvo como objetivo evaluar el efecto de la pre-sincronización con progesterona (P4) por 3 y 6 días en vacas de raza Nelore en periodo de anestro posparto, sometidas a un programa de inseminación artificial a tiempo fijo (IATF).  Materiales y métodos: Fueron utilizadas 74 vacas multíparas de raza Nelore con estado de condición corporal de 2,5. Las vacas fueron sometidas a tres grupos experimentales, grupo control y grupos pre-sincronizados con P4 por un periodo de 3 y 6 días. Para la determinación del estado de anestro posparto, fueron realizadas ecografías y toma de muestras de sangre con la finalidad de verificar la ausencia de P4 endógena. Cuarenta y cinco días después de la IA fue realizado el diagnóstico de la gestación. Los datos fueron obtenidos por análisis descriptivo y en el caso de presentación de diferencias significativas fue utilizado la prueba de Chi-cuadrado, considerándose una frecuencia de P&lt; 0,05.  Resultados: Fue observada mayor tasa de gestación para el grupo que fue pre-sincronizado por tres días con P4 (40 %), con relación a los grupos de seis días de pre-sincronización y control (25 % y 32 %, respectivamente).  Conclusión: Es posible concluir que la pre-sincronización con P4 por tres días, mejoró la tasa de gestación de vacas de raza Nelore en periodo de anestro posparto.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract  Objective: The objective of this study was to evaluate the effect of pre-synchronization with progesterone (P4) for 3 and 6 days in Nelore cows in postpartum anestrus period, submitted to a fixed-time artificial insemination program (FTAI).  Materials and methods: Seventy-four multiparous Nelore cows with a body condition of 2.5 were used. The cows were submitted to three experimental groups, control group and groups pre-synchronized with P4 for a period of 3 and 6 days. For the determination of postpartum anestrus status, ultrasound scans and blood samples were taken to verify the absence of endogenous P4. Forty-five days after AI, gestation was diagnosed. Data were obtained by descriptive analysis and in the case of presentation of significant differences the Chi-square test was used, considering a frequency of P &lt; 0.05.  Results: A higher gestation rate was observed for the group that was pre-synchronized for three days with P4 (40 %), in relation to the groups of six days of pre-synchronization and control (25 % and 32 %, respectively).  Conclusion: It is possible to conclude that the pre-synchronization with P4 for three days improved the gestation rate of Nelore cows in the postpartum anestrus period.]]></p></abstract>
<abstract abstract-type="short" xml:lang="pt"><p><![CDATA[Resumo  Objetivo: O objetivo deste estudo foi avaliar o efeito da pré-sincronização com progesterona (P4) durante 3 e 6 dias em vacas de raça Nelore em período de anestro pós-parto, submetidas a um programa de inseminação artificial em tempo fixo (IATF).  Materiais e métodos: Foram utilizadas 74 vacas multíparas da raça Nelore com estado de condição corporal de 2,5. As vacas foram submetidas a três grupos experimentais, grupo controle e grupos pré-sincronizados com P4 por um período de 3 e 6 dias. Para a determinação do estado de anestro pós-parto, foram realizadas ultrassonografias e coleta de amostras de sangue com a finalidade de verificar a ausência de P4 endógena. Quarenta e cinco dias após a IA foi realizado o diagnostico da gestação. Os dados foram obtidos por análise descritiva e no caso de diferenças significativas foi utilizado o teste do Quí-quadrado, considerando-se uma freqüência de P &lt; 0,05.  Resultados: Foi observada maior taxa de gestação para o grupo que foi pré-sincronizado por três dias com P4 (40 %), com relação aos grupos de seis dias de pré-sincronização e controle (25 % e 32 %, respetivamente).  Conclusão: É possível concluir que a pré-sincronização com P4 por três dias, melhorou a taxa de gestação de vacas Nelore em período de anestro pós-parto.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Bos indicus]]></kwd>
<kwd lng="es"><![CDATA[inseminación artificial]]></kwd>
<kwd lng="es"><![CDATA[ovulación]]></kwd>
<kwd lng="es"><![CDATA[pre-sincronización]]></kwd>
<kwd lng="es"><![CDATA[progesterona]]></kwd>
<kwd lng="en"><![CDATA[Artificial insemination]]></kwd>
<kwd lng="en"><![CDATA[Bos indicus]]></kwd>
<kwd lng="en"><![CDATA[hormones]]></kwd>
<kwd lng="en"><![CDATA[ovulation]]></kwd>
<kwd lng="en"><![CDATA[pregnancy rates]]></kwd>
<kwd lng="pt"><![CDATA[Bos indicus]]></kwd>
<kwd lng="pt"><![CDATA[inseminação artificial]]></kwd>
<kwd lng="pt"><![CDATA[ovulação]]></kwd>
<kwd lng="pt"><![CDATA[pré-sincronização]]></kwd>
<kwd lng="pt"><![CDATA[progesterona]]></kwd>
</kwd-group>
</article-meta>
</front><back>
<ref-list>
<ref id="B1">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Almeida]]></surname>
<given-names><![CDATA[I. C.]]></given-names>
</name>
</person-group>
<source><![CDATA[Efeito do protocolo de pré-sincronização em vacas mestiças no período pós-parto]]></source>
<year>2015</year>
<publisher-loc><![CDATA[Brasil ]]></publisher-loc>
<publisher-name><![CDATA[Universidade Federal do Espírito Santo]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B2">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Ayres]]></surname>
<given-names><![CDATA[H.]]></given-names>
</name>
<name>
<surname><![CDATA[Ferreira]]></surname>
<given-names><![CDATA[R. M.]]></given-names>
</name>
<name>
<surname><![CDATA[Cunha]]></surname>
<given-names><![CDATA[A. P.]]></given-names>
</name>
<name>
<surname><![CDATA[Araújo]]></surname>
<given-names><![CDATA[R. R.]]></given-names>
</name>
<name>
<surname><![CDATA[Wiltbank]]></surname>
<given-names><![CDATA[M. C.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Double-Ovsynch in high-producing dairy cows: Effects on progesterone concentrations and ovulation to GnRH treatments]]></article-title>
<source><![CDATA[Theriogenology]]></source>
<year>2013</year>
<volume>79</volume>
<numero>1</numero>
<issue>1</issue>
<page-range>159-64</page-range></nlm-citation>
</ref>
<ref id="B3">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Ayres]]></surname>
<given-names><![CDATA[H.]]></given-names>
</name>
<name>
<surname><![CDATA[Ferreira]]></surname>
<given-names><![CDATA[R.]]></given-names>
</name>
<name>
<surname><![CDATA[de Souza Torres-Júnior]]></surname>
<given-names><![CDATA[J.]]></given-names>
</name>
<name>
<surname><![CDATA[Demétrio]]></surname>
<given-names><![CDATA[C.]]></given-names>
</name>
<name>
<surname><![CDATA[de Lima]]></surname>
<given-names><![CDATA[C.]]></given-names>
</name>
<name>
<surname><![CDATA[Baruselli]]></surname>
<given-names><![CDATA[P.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Validation of body condition score as a predictor of subcutaneous fat in Nelore (Bos indicus) cows]]></article-title>
<source><![CDATA[Livestock Science]]></source>
<year>2009</year>
<volume>723</volume>
<numero>2-3</numero>
<issue>2-3</issue>
<page-range>175-9</page-range></nlm-citation>
</ref>
<ref id="B4">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Baruselli]]></surname>
<given-names><![CDATA[P.]]></given-names>
</name>
<name>
<surname><![CDATA[Ferreira]]></surname>
<given-names><![CDATA[R.]]></given-names>
</name>
<name>
<surname><![CDATA[Colli]]></surname>
<given-names><![CDATA[M.]]></given-names>
</name>
<name>
<surname><![CDATA[Elliff]]></surname>
<given-names><![CDATA[F.]]></given-names>
</name>
<name>
<surname><![CDATA[Sá Filho]]></surname>
<given-names><![CDATA[M.]]></given-names>
</name>
<name>
<surname><![CDATA[Vieira]]></surname>
<given-names><![CDATA[L.]]></given-names>
</name>
<name>
<surname><![CDATA[Freitas]]></surname>
<given-names><![CDATA[B.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Timed artificial insemination: Current challenges and recent advances in reproductive efficiency in beef and dairy herds in Brazil]]></article-title>
<source><![CDATA[Animal Reproduction]]></source>
<year>2017</year>
<volume>74</volume>
<numero>3</numero>
<issue>3</issue>
<page-range>558-71</page-range></nlm-citation>
</ref>
<ref id="B5">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Bastos de Souza]]></surname>
<given-names><![CDATA[A.]]></given-names>
</name>
<name>
<surname><![CDATA[Talini]]></surname>
<given-names><![CDATA[R.]]></given-names>
</name>
<name>
<surname><![CDATA[Ernandes Kozicki]]></surname>
<given-names><![CDATA[L.]]></given-names>
</name>
<name>
<surname><![CDATA[Saporski Segui]]></surname>
<given-names><![CDATA[M.]]></given-names>
</name>
<name>
<surname><![CDATA[Pedrosa]]></surname>
<given-names><![CDATA[V.]]></given-names>
</name>
<name>
<surname><![CDATA[Weiss]]></surname>
<given-names><![CDATA[R.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Pré-sincronização do estro em novilhas Bos taurus indicus visando a maximização da eficiência reprodutiva na estação de monta]]></article-title>
<source><![CDATA[Revista Acadêmica Ciência Animal]]></source>
<year>2016</year>
<numero>74</numero>
<issue>74</issue>
<page-range>209</page-range></nlm-citation>
</ref>
<ref id="B6">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Crowe]]></surname>
<given-names><![CDATA[M. A.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Resumption of ovarian cyclicity in post-partum beef and dairy cows.]]></article-title>
<source><![CDATA[Reproduction in Domestic Animals]]></source>
<year>2008</year>
<volume>43</volume>
<numero>5</numero>
<issue>5</issue>
<page-range>20-8</page-range></nlm-citation>
</ref>
<ref id="B7">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Cunha]]></surname>
<given-names><![CDATA[A. P.]]></given-names>
</name>
<name>
<surname><![CDATA[Guenther]]></surname>
<given-names><![CDATA[M. J.]]></given-names>
</name>
<name>
<surname><![CDATA[Maroney]]></surname>
<given-names><![CDATA[J. O.]]></given-names>
</name>
<name>
<surname><![CDATA[Giordano]]></surname>
<given-names><![CDATA[A. B.]]></given-names>
</name>
<name>
<surname><![CDATA[Ayres]]></surname>
<given-names><![CDATA[H.]]></given-names>
</name>
<name>
<surname><![CDATA[Wiltbank]]></surname>
<given-names><![CDATA[M. C.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Effects of high vs. Low progesterone concentrations during Ovsynch on double ovulation rate and pregnancies per AI in high producing dairy cows.]]></article-title>
<source><![CDATA[Journal of Dairy Science]]></source>
<year>2008</year>
<volume>97</volume>
<numero>1</numero>
<issue>1</issue>
<page-range>246</page-range></nlm-citation>
</ref>
<ref id="B8">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Da Silva]]></surname>
<given-names><![CDATA[L. A. C.]]></given-names>
</name>
</person-group>
<source><![CDATA[Pré-sincronização com folículo persistente em protocolos de sincronização da ovulação a base de gnrh em vacas de leite em lactação]]></source>
<year>2017</year>
<publisher-loc><![CDATA[Brasil ]]></publisher-loc>
<publisher-name><![CDATA[Universidade Federal de Lavras]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B9">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Dantas]]></surname>
<given-names><![CDATA[A. F.]]></given-names>
</name>
<name>
<surname><![CDATA[Pereira Filho]]></surname>
<given-names><![CDATA[J. M]]></given-names>
</name>
<name>
<surname><![CDATA[Silva]]></surname>
<given-names><![CDATA[A. M. A.]]></given-names>
</name>
<name>
<surname><![CDATA[dos Santos]]></surname>
<given-names><![CDATA[E. M]]></given-names>
</name>
<name>
<surname><![CDATA[de Sousa]]></surname>
</name>
<name>
<surname><![CDATA[Cézar]]></surname>
<given-names><![CDATA[M. F.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Características da carcaça de ovinos Santa Inês terminados em pastejo e submetidos a diferentes níveis de suplementação]]></article-title>
<source><![CDATA[Ciência Agrotecnica]]></source>
<year>2008</year>
<volume>32</volume>
<numero>4</numero>
<issue>4</issue>
<page-range>1280-6</page-range></nlm-citation>
</ref>
<ref id="B10">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Day]]></surname>
<given-names><![CDATA[M. L.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Hormonal induction of estrous cycles in anestrous Bos taurus beef cows.]]></article-title>
<source><![CDATA[Animal Reproduction Science]]></source>
<year>2004</year>
<numero>82-83</numero>
<issue>82-83</issue>
<page-range>487-94</page-range></nlm-citation>
</ref>
<ref id="B11">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Fernandez-Novo]]></surname>
<given-names><![CDATA[A.]]></given-names>
</name>
<name>
<surname><![CDATA[Pérez-Garnelo]]></surname>
<given-names><![CDATA[S. S.]]></given-names>
</name>
<name>
<surname><![CDATA[Villagra]]></surname>
<given-names><![CDATA[A.]]></given-names>
</name>
<name>
<surname><![CDATA[Pérez-Villalobos]]></surname>
<given-names><![CDATA[N.]]></given-names>
</name>
<name>
<surname><![CDATA[Astiz]]></surname>
<given-names><![CDATA[S.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[The Effect of stress on reproduction and reproductive technologies in beef cattle - A Review]]></article-title>
<source><![CDATA[Animals]]></source>
<year>2020</year>
<numero>70</numero>
<issue>70</issue>
<page-range>2096</page-range></nlm-citation>
</ref>
<ref id="B12">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Franke]]></surname>
<given-names><![CDATA[TM]]></given-names>
</name>
<name>
<surname><![CDATA[Ho]]></surname>
<given-names><![CDATA[T]]></given-names>
</name>
<name>
<surname><![CDATA[Christie]]></surname>
<given-names><![CDATA[CA.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[The chi-square test: often used and more often misinterpreted]]></article-title>
<source><![CDATA[Am J Eval]]></source>
<year>2012</year>
<numero>33</numero>
<issue>33</issue>
<page-range>448-58</page-range></nlm-citation>
</ref>
<ref id="B13">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Garcés]]></surname>
<given-names><![CDATA[L. F.]]></given-names>
</name>
<name>
<surname><![CDATA[Giraldo]]></surname>
<given-names><![CDATA[C.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Bioética en la experimentación científica con animales: cuestión de reglamentación o de actitud humana]]></article-title>
<source><![CDATA[Revista Lasallista de Investigación]]></source>
<year>2012</year>
<volume>9</volume>
<numero>1</numero>
<issue>1</issue>
<page-range>159-66</page-range></nlm-citation>
</ref>
<ref id="B14">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Henao]]></surname>
<given-names><![CDATA[G.]]></given-names>
</name>
<name>
<surname><![CDATA[Olivera-Ángel]]></surname>
<given-names><![CDATA[M.]]></given-names>
</name>
<name>
<surname><![CDATA[Maldonado-Estrada]]></surname>
<given-names><![CDATA[J.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Follicular dynamics during postpartum anestrus and the first estrous cycle in suckled or non-suckled Brahman (Bos indicus) cows]]></article-title>
<source><![CDATA[Animal Reproduction Science]]></source>
<year>2000</year>
<volume>¿3</volume>
<numero>3-4</numero>
<issue>3-4</issue>
<page-range>127-36</page-range></nlm-citation>
</ref>
<ref id="B15">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Herlihy]]></surname>
<given-names><![CDATA[M. M.]]></given-names>
</name>
<name>
<surname><![CDATA[Giordano]]></surname>
<given-names><![CDATA[J. O.]]></given-names>
</name>
<name>
<surname><![CDATA[Souza]]></surname>
<given-names><![CDATA[A. H.]]></given-names>
</name>
<name>
<surname><![CDATA[Ayres]]></surname>
<given-names><![CDATA[H.]]></given-names>
</name>
<name>
<surname><![CDATA[Ferreira]]></surname>
<given-names><![CDATA[R. M.]]></given-names>
</name>
<name>
<surname><![CDATA[Keskin]]></surname>
<given-names><![CDATA[A.]]></given-names>
</name>
<name>
<surname><![CDATA[Wiltbank]]></surname>
<given-names><![CDATA[M. C.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Presynchronization with Double-Ovsynch improves fertility at first postpartum artificial insemination in lactating dairy cows]]></article-title>
<source><![CDATA[Journal of Dairy Science]]></source>
<year>2012</year>
<volume>95</volume>
<numero>12</numero>
<issue>12</issue>
<page-range>7003-14</page-range></nlm-citation>
</ref>
<ref id="B16">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Lonergan]]></surname>
<given-names><![CDATA[P.]]></given-names>
</name>
<name>
<surname><![CDATA[Sánchez]]></surname>
<given-names><![CDATA[J.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Symposium review: Progesterone effects on early embryo development in cattle]]></article-title>
<source><![CDATA[Journal of Dairy Science]]></source>
<year>2020</year>
<volume>703</volume>
<numero>9</numero>
<issue>9</issue>
<page-range>8698-707</page-range></nlm-citation>
</ref>
<ref id="B17">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Mackey]]></surname>
<given-names><![CDATA[D. R.]]></given-names>
</name>
<name>
<surname><![CDATA[Sreenan]]></surname>
<given-names><![CDATA[J. M.]]></given-names>
</name>
<name>
<surname><![CDATA[Rochet]]></surname>
<given-names><![CDATA[J. F.]]></given-names>
</name>
<name>
<surname><![CDATA[Diskin]]></surname>
<given-names><![CDATA[M. G.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[The effect of progesterone alone or in combination with estradiol on follicular dynamics, gonadotropin profiles, and estrus in beef cows following calf isolation and restricted suckling.]]></article-title>
<source><![CDATA[Journal of Animal Science]]></source>
<year>2000</year>
<volume>78</volume>
<numero>7</numero>
<issue>7</issue>
<page-range>1917-29</page-range></nlm-citation>
</ref>
<ref id="B18">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Naikoo]]></surname>
<given-names><![CDATA[M.]]></given-names>
</name>
<name>
<surname><![CDATA[Dhami]]></surname>
<given-names><![CDATA[A.]]></given-names>
</name>
<name>
<surname><![CDATA[Ramakrishnan]]></surname>
<given-names><![CDATA[A.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Effect of estrus synchronization on plasma progesterone profile and fertility response in postpartum suckled anestrous Kankrej cows.]]></article-title>
<source><![CDATA[Indian Journal of Animal Research]]></source>
<year>2016</year>
<numero>50</numero>
<issue>50</issue>
<page-range>B-2783</page-range></nlm-citation>
</ref>
<ref id="B19">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Nash]]></surname>
<given-names><![CDATA[J. M.]]></given-names>
</name>
<name>
<surname><![CDATA[Mallory]]></surname>
<given-names><![CDATA[D. A.]]></given-names>
</name>
<name>
<surname><![CDATA[Ellersieck]]></surname>
<given-names><![CDATA[M. R.]]></given-names>
</name>
<name>
<surname><![CDATA[Pook]]></surname>
<given-names><![CDATA[S. E.]]></given-names>
</name>
<name>
<surname><![CDATA[Smith]]></surname>
<given-names><![CDATA[M. F.]]></given-names>
</name>
<name>
<surname><![CDATA[Patterson]]></surname>
<given-names><![CDATA[D. J.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Comparison of long-versus short-term CIDR-based protocols to synchronize estrus prior to fixed-time AI in postpartum beef cows]]></article-title>
<source><![CDATA[Animal Reproduction Science]]></source>
<year>2012</year>
<volume>732</volume>
<numero>1</numero>
<issue>1</issue>
</nlm-citation>
</ref>
<ref id="B20">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Núñez-Olivera]]></surname>
<given-names><![CDATA[R.]]></given-names>
</name>
<name>
<surname><![CDATA[de Castro]]></surname>
<given-names><![CDATA[T.]]></given-names>
</name>
<name>
<surname><![CDATA[Bó]]></surname>
<given-names><![CDATA[G.]]></given-names>
</name>
<name>
<surname><![CDATA[Piaggio]]></surname>
<given-names><![CDATA[J.]]></given-names>
</name>
<name>
<surname><![CDATA[Menchaca]]></surname>
<given-names><![CDATA[A.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Equine chorionic gonadotropin administration after insemination affects luteal function and pregnancy establishment in postpartum anestrous beef cows]]></article-title>
<source><![CDATA[Domestic Animal Endocrinology]]></source>
<year>2018</year>
<numero>62</numero>
<issue>62</issue>
<page-range>24-31</page-range></nlm-citation>
</ref>
<ref id="B21">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Ratzburg]]></surname>
<given-names><![CDATA[K.]]></given-names>
</name>
<name>
<surname><![CDATA[Jorgensen-Muga]]></surname>
<given-names><![CDATA[K.]]></given-names>
</name>
<name>
<surname><![CDATA[Murugesan]]></surname>
<given-names><![CDATA[J.]]></given-names>
</name>
<name>
<surname><![CDATA[Kastelic]]></surname>
<given-names><![CDATA[J.]]></given-names>
</name>
<name>
<surname><![CDATA[Kasimanickam]]></surname>
<given-names><![CDATA[V.]]></given-names>
</name>
<name>
<surname><![CDATA[Kasimanickam]]></surname>
<given-names><![CDATA[R.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Presynchronization with CIDR, with or without GnRH, prior to CO-Synch in beef heifers]]></article-title>
<source><![CDATA[Theriogenology]]></source>
<year>2020</year>
<numero>746</numero>
<issue>746</issue>
<page-range>80-7</page-range></nlm-citation>
</ref>
<ref id="B22">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Rhodes]]></surname>
<given-names><![CDATA[F.]]></given-names>
</name>
<name>
<surname><![CDATA[McDougall]]></surname>
<given-names><![CDATA[S.]]></given-names>
</name>
<name>
<surname><![CDATA[Burke]]></surname>
<given-names><![CDATA[C.]]></given-names>
</name>
<name>
<surname><![CDATA[Verkerk]]></surname>
<given-names><![CDATA[G.]]></given-names>
</name>
<name>
<surname><![CDATA[Macmillan]]></surname>
<given-names><![CDATA[K.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Invited Review: Treatment of Cows with an Extended Postpartum Anestrous Interval]]></article-title>
<source><![CDATA[Journal of Dairy Science]]></source>
<year>2003</year>
<volume>86</volume>
<numero>6</numero>
<issue>6</issue>
<page-range>1876-94</page-range></nlm-citation>
</ref>
<ref id="B23">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Roche]]></surname>
<given-names><![CDATA[J.]]></given-names>
</name>
<name>
<surname><![CDATA[Mackey]]></surname>
<given-names><![CDATA[D.]]></given-names>
</name>
<name>
<surname><![CDATA[Diskin]]></surname>
<given-names><![CDATA[M.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Reproductive management of postpartum cows]]></article-title>
<source><![CDATA[Animal Reproduction Science]]></source>
<year>2000</year>
<numero>60-67</numero>
<issue>60-67</issue>
<page-range>703-12</page-range></nlm-citation>
</ref>
<ref id="B24">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Sales]]></surname>
<given-names><![CDATA[J. N. S.]]></given-names>
</name>
<name>
<surname><![CDATA[Bottino]]></surname>
<given-names><![CDATA[M. P.]]></given-names>
</name>
<name>
<surname><![CDATA[Silva]]></surname>
<given-names><![CDATA[L. A.]]></given-names>
</name>
<name>
<surname><![CDATA[Girotto]]></surname>
<given-names><![CDATA[R. W.]]></given-names>
</name>
<name>
<surname><![CDATA[Massoneto]]></surname>
<given-names><![CDATA[J. P.]]></given-names>
</name>
<name>
<surname><![CDATA[Souza]]></surname>
<given-names><![CDATA[J. C.]]></given-names>
</name>
<name>
<surname><![CDATA[Baruselli]]></surname>
<given-names><![CDATA[P. S.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Effects of eCG are more pronounced in primiparous than multiparous Bos indicus cows submitted to a timed artificial insemination protocol.]]></article-title>
<source><![CDATA[Theriogenology]]></source>
<year>2016</year>
<volume>86</volume>
<numero>9</numero>
<issue>9</issue>
<page-range>22902295</page-range></nlm-citation>
</ref>
<ref id="B25">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Wiltbank]]></surname>
<given-names><![CDATA[M. C.]]></given-names>
</name>
<name>
<surname><![CDATA[Baez]]></surname>
<given-names><![CDATA[G. M.]]></given-names>
</name>
<name>
<surname><![CDATA[Cochrane]]></surname>
<given-names><![CDATA[F.]]></given-names>
</name>
<name>
<surname><![CDATA[Barletta]]></surname>
<given-names><![CDATA[R. V.]]></given-names>
</name>
<name>
<surname><![CDATA[Trayford]]></surname>
<given-names><![CDATA[C. R]]></given-names>
</name>
<name>
<surname><![CDATA[Joseph]]></surname>
<given-names><![CDATA[R. T.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Effect of a second treatment with prostaglandin F2alpha during the Ovsynch protocol on luteolysis and pregnancy in dairy cows]]></article-title>
<source><![CDATA[Jounal of Dairy Science]]></source>
<year>2015</year>
<volume>98</volume>
<numero>12</numero>
<issue>12</issue>
<page-range>8644-54</page-range></nlm-citation>
</ref>
<ref id="B26">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Yan]]></surname>
<given-names><![CDATA[L.]]></given-names>
</name>
<name>
<surname><![CDATA[Robinson]]></surname>
<given-names><![CDATA[R.]]></given-names>
</name>
<name>
<surname><![CDATA[Shi]]></surname>
<given-names><![CDATA[Z.]]></given-names>
</name>
<name>
<surname><![CDATA[Mann]]></surname>
<given-names><![CDATA[G.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Efficacy of progesterone supplementation during early pregnancy in cows: A meta-analysis.]]></article-title>
<source><![CDATA[Theriogenology]]></source>
<year>2016</year>
<volume>85</volume>
<numero>8</numero>
<issue>8</issue>
<page-range>1390-8</page-range></nlm-citation>
</ref>
<ref id="B27">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Yavas]]></surname>
<given-names><![CDATA[Y.]]></given-names>
</name>
<name>
<surname><![CDATA[Walton]]></surname>
<given-names><![CDATA[J. S.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Postpartum acyclicity in suckled beef cows: a review.]]></article-title>
<source><![CDATA[Theriogenology]]></source>
<year>2000</year>
<volume>54</volume>
<numero>1</numero>
<issue>1</issue>
<page-range>25-55</page-range></nlm-citation>
</ref>
</ref-list>
</back>
</article>
