1 Ocak 2019 Dergi makalesi Açık Erişim

Shahzad, A. H.; Sattar, A.; Husnain, A.; Ahmad, I.; Ahmad, N.; Nak, D.; Nak, Y.

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  <identifier identifierType="URL">https://aperta.ulakbim.gov.tr/record/112070</identifier>
  <creators>
    <creator>
      <creatorName>Shahzad, A. H.</creatorName>
      <givenName>A. H.</givenName>
      <familyName>Shahzad</familyName>
      <affiliation>Univ Vet &amp; Anim Sci, Theriogenol Dept, Lahore, Pakistan</affiliation>
    </creator>
    <creator>
      <creatorName>Sattar, A.</creatorName>
      <givenName>A.</givenName>
      <familyName>Sattar</familyName>
      <affiliation>Univ Vet &amp; Anim Sci, Theriogenol Dept, Lahore, Pakistan</affiliation>
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    <creator>
      <creatorName>Husnain, A.</creatorName>
      <givenName>A.</givenName>
      <familyName>Husnain</familyName>
      <affiliation>Univ Vet &amp; Anim Sci, Theriogenol Dept, Lahore, Pakistan</affiliation>
    </creator>
    <creator>
      <creatorName>Ahmad, I.</creatorName>
      <givenName>I.</givenName>
      <familyName>Ahmad</familyName>
      <affiliation>Univ Vet &amp; Anim Sci, Physiol Dept, Lahore, Pakistan</affiliation>
    </creator>
    <creator>
      <creatorName>Ahmad, N.</creatorName>
      <givenName>N.</givenName>
      <familyName>Ahmad</familyName>
      <affiliation>Univ Vet &amp; Anim Sci, Theriogenol Dept, Lahore, Pakistan</affiliation>
    </creator>
    <creator>
      <creatorName>Nak, D.</creatorName>
      <givenName>D.</givenName>
      <familyName>Nak</familyName>
      <affiliation>Uudag Univ, Dept Obstet &amp; Gynecol, Bursa, Turkey</affiliation>
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    <creator>
      <creatorName>Nak, Y.</creatorName>
      <givenName>Y.</givenName>
      <familyName>Nak</familyName>
      <affiliation>Uudag Univ, Dept Obstet &amp; Gynecol, Bursa, Turkey</affiliation>
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  </creators>
  <titles>
    <title>Synchronization And Resynchronization As A Novel Approach For Improving Reproductive Performance Of Postpartum Dairy Cows</title>
  </titles>
  <publisher>Aperta</publisher>
  <publicationYear>2019</publicationYear>
  <dates>
    <date dateType="Issued">2019-01-01</date>
  </dates>
  <resourceType resourceTypeGeneral="Text">Journal article</resourceType>
  <alternateIdentifiers>
    <alternateIdentifier alternateIdentifierType="url">https://aperta.ulakbim.gov.tr/record/112070</alternateIdentifier>
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  <relatedIdentifiers>
    <relatedIdentifier relatedIdentifierType="DOI" relationType="IsIdenticalTo">10.17582/journal.pjz/2019.51.2.511.520</relatedIdentifier>
  </relatedIdentifiers>
  <rightsList>
    <rights rightsURI="http://www.opendefinition.org/licenses/cc-by">Creative Commons Attribution</rights>
    <rights rightsURI="info:eu-repo/semantics/openAccess">Open Access</rights>
  </rightsList>
  <descriptions>
    <description descriptionType="Abstract">Estrus synchronization and suitable resynchronization intervention is crucial part of improved reproductive management in dairy industry. Our objectives were to appraise CIDR-EB based estrus synchronization and used CIDR-Ovsynch based resynch protocol in lactating Holstein cows at two different geographical locations. On location A, 160 postpartum cows were enrolled in standard CIDR-EB protocol. Cows were subjected to timed AI and randomly assigned into two groups: 1) control (n=70), subjected to AI on detected estrus (AIDE) from d18-d30 post TAI. Pregnancy rate was diagnosed on d30, d60 and d90 post TAI, 2) resynch (n=90) received CIDR from d14-d21 post TAI. On day 23, all cows received GnRH shot and open cows received remaining Ovsynch protocol. Blood was collected on d14,d16 and d30 for P4 profile. Cross-sectional area of luteal tissue was measured on d30 in pregnant animals in both groups. In experiment II, both control (n=64) and resynch (n=54) groups were similarly treated as in experiment I, without P4 profile and luteal cross-sectional area measurement. Pregnancy rate(PR) was compared by PROC FREQ of SAS. Effect of treatment on circulatory P4 profile and luteal tissue cross-sectional area were analyzed using GLM procedures (P&amp;lt;0.05). The PR on d30 in control (43%) and resynch (48%) groups was non-significant. On d60 and d90 overall PR was 44 and 73% (P=0.002) and 43 and 72% (P=0.002) while overall pregnancy loss was 11 and 4 /0 in control and resynch groups, respectively. In experiment II, PR on d30, d60 and d90 was 44 versus 54% (P=0.28), 53 versus 72% (P=0.03) and 50 versus 70% (P=0.025) in control and resynch groups with overall pregnancy loss of 14 and 3%. Mean P4 profile (ng/mL) was non-significant on d14 while significant on d16 and d30 post TAI in control and resynch groups. Mean luteal cross-sectional area on d30 post TAI has significant difference between both groups. In conclusion, a significant increase in overall PR in resynch group makes it an efficient reproductive management tool in comparison with control group.</description>
  </descriptions>
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