Success of artificial insemination based on expression of estrus and the addition of GnRH to an estradiol/progesterone-based protocol on pregnancy rates in lactating dairy cows
Three experiments evaluated the effects of insemination based on estrus expression or treatment with GnRH, on the time of ovulation and pregnancy rates to AI (P/AI) in dairy cows. All cows were treated with a P4 device for 8 d, estradiol benzoate at device insertion and prostaglandin F2α, estradiol...
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| Veröffentlicht in: | Animal reproduction science 2022-03, Vol.238, p.106954-106954, Article 106954 |
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| creator | Tschopp, Juan Carlos Bó, Gabriel A. |
| description | Three experiments evaluated the effects of insemination based on estrus expression or treatment with GnRH, on the time of ovulation and pregnancy rates to AI (P/AI) in dairy cows. All cows were treated with a P4 device for 8 d, estradiol benzoate at device insertion and prostaglandin F2α, estradiol cypionate and eCG at device removal. In Experiment 1, P/AI was less (P |
| doi_str_mv | 10.1016/j.anireprosci.2022.106954 |
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•Modification of the time of insemination based on estrus expression improved P/AI in lactating dairy cows.•The greatest P/AI were obtained when cows in estrus by 48 h after P4 device removal were inseminated at that time whereas cows not in estrus at 48 h were inseminated 12 h later.•GnRH treatment to those cows that did not show estrus increased P/AI.</description><identifier>ISSN: 0378-4320</identifier><identifier>EISSN: 1873-2232</identifier><identifier>DOI: 10.1016/j.anireprosci.2022.106954</identifier><identifier>PMID: 35240469</identifier><language>eng</language><publisher>Netherlands: Elsevier B.V</publisher><subject>Animals ; Cattle ; Dairy cows ; Dinoprost - pharmacology ; Estradiol - pharmacology ; Estrus ; Estrus Synchronization - methods ; Female ; Gonadotropin-Releasing Hormone - pharmacology ; Insemination, Artificial - methods ; Insemination, Artificial - veterinary ; Lactation ; Ovulation ; Pregnancy ; Pregnancy Rate ; Progesterone - pharmacology ; Timed AI</subject><ispartof>Animal reproduction science, 2022-03, Vol.238, p.106954-106954, Article 106954</ispartof><rights>2022 Elsevier B.V.</rights><rights>Copyright © 2022 Elsevier B.V. All rights reserved.</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c377t-492ae4217ac587b10f4f0baca1451b2cc8e5717198e291f889e79344c6276b2c3</citedby><cites>FETCH-LOGICAL-c377t-492ae4217ac587b10f4f0baca1451b2cc8e5717198e291f889e79344c6276b2c3</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://www.sciencedirect.com/science/article/pii/S0378432022000331$$EHTML$$P50$$Gelsevier$$H</linktohtml><link.rule.ids>314,776,780,3537,27901,27902,65306</link.rule.ids><backlink>$$Uhttps://www.ncbi.nlm.nih.gov/pubmed/35240469$$D View this record in MEDLINE/PubMed$$Hfree_for_read</backlink></links><search><creatorcontrib>Tschopp, Juan Carlos</creatorcontrib><creatorcontrib>Bó, Gabriel A.</creatorcontrib><title>Success of artificial insemination based on expression of estrus and the addition of GnRH to an estradiol/progesterone-based protocol on pregnancy rates in lactating dairy cows</title><title>Animal reproduction science</title><addtitle>Anim Reprod Sci</addtitle><description>Three experiments evaluated the effects of insemination based on estrus expression or treatment with GnRH, on the time of ovulation and pregnancy rates to AI (P/AI) in dairy cows. All cows were treated with a P4 device for 8 d, estradiol benzoate at device insertion and prostaglandin F2α, estradiol cypionate and eCG at device removal. In Experiment 1, P/AI was less (P < 0.01) when all cows were inseminated at 48 h after device removal (31%) than when cows showing estrus at 48 h were inseminated at that time and those not in estrus received GnRH and were inseminated 12 h later (53%). In Experiment 2, cows in estrus by 48 h ovulated earlier than cows that were not in estrus but received GnRH and those that did not receive GnRH. Cows that were in estrus and inseminated at 48 h (47.8%) and those not in estrus at 48 h but inseminated at 60 h (53.4%) had greater P/AI (P < 0.05) than cows that were in estrus at 48 h but were inseminated at 60 h (29.7%) or inseminated at 48 h in the absence of estrus (19.4%). In Experiment 3, GnRH treatment of cows not showing estrus at 48 h and inseminated at 60 h had greater P/AI (58.5%; P < 0.05) than those not treated with GnRH but inseminated at 60 h (39.5%). Artificial insemination based on estrus expression and the inclusion of GnRH in those not in estrus increased P/AI in lactating dairy cows.
•Modification of the time of insemination based on estrus expression improved P/AI in lactating dairy cows.•The greatest P/AI were obtained when cows in estrus by 48 h after P4 device removal were inseminated at that time whereas cows not in estrus at 48 h were inseminated 12 h later.•GnRH treatment to those cows that did not show estrus increased P/AI.</description><subject>Animals</subject><subject>Cattle</subject><subject>Dairy cows</subject><subject>Dinoprost - pharmacology</subject><subject>Estradiol - pharmacology</subject><subject>Estrus</subject><subject>Estrus Synchronization - methods</subject><subject>Female</subject><subject>Gonadotropin-Releasing Hormone - pharmacology</subject><subject>Insemination, Artificial - methods</subject><subject>Insemination, Artificial - veterinary</subject><subject>Lactation</subject><subject>Ovulation</subject><subject>Pregnancy</subject><subject>Pregnancy Rate</subject><subject>Progesterone - pharmacology</subject><subject>Timed AI</subject><issn>0378-4320</issn><issn>1873-2232</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2022</creationdate><recordtype>article</recordtype><sourceid>EIF</sourceid><recordid>eNqNkc9u1DAQxi0EokvLKyBz45Kt_yVOjmhFW6RKSEDPluNMFq-y9mI7tPtWPCKzZEEcOdme-c03n_UR8pazNWe8ud6tbfAJDilm59eCCYH1pqvVM7LirZaVEFI8JysmdVspKdgFeZXzjjGmm6Z7SS5kLRRTTbciP7_MzkHONI7UpuJH77ydqA8Z9j7Y4mOgvc0wULzA0yEhe6ohDrmkOVMbBlq-AbXD4Mu5dRs-39ESsfebsoOP0zXa3eILUgxQLZpYKtHF6SSO0ttggzvSZAtktEAn6wpaCFs6WJ-O1MXHfEVejHbK8Pp8XpKHmw9fN3fV_afbj5v395WTWpdKdcKCElxbV7e652xUI-uts1zVvBfOtVBrrnnXguj42LYd6E4q5RqhG-zLS_Ju0UWP32f0bfY-O5gmGyDO2YhGNlzJlilEuwV1GEhOMJpD8nubjoYzcwrM7Mw_gZlTYGYJDGffnNfM_R6Gv5N_EkJgswCAn_3hIRmUgOBgQEFXzBD9f6z5BUrPsSw</recordid><startdate>202203</startdate><enddate>202203</enddate><creator>Tschopp, Juan Carlos</creator><creator>Bó, Gabriel A.</creator><general>Elsevier B.V</general><scope>CGR</scope><scope>CUY</scope><scope>CVF</scope><scope>ECM</scope><scope>EIF</scope><scope>NPM</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7X8</scope></search><sort><creationdate>202203</creationdate><title>Success of artificial insemination based on expression of estrus and the addition of GnRH to an estradiol/progesterone-based protocol on pregnancy rates in lactating dairy cows</title><author>Tschopp, Juan Carlos ; Bó, Gabriel A.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c377t-492ae4217ac587b10f4f0baca1451b2cc8e5717198e291f889e79344c6276b2c3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2022</creationdate><topic>Animals</topic><topic>Cattle</topic><topic>Dairy cows</topic><topic>Dinoprost - pharmacology</topic><topic>Estradiol - pharmacology</topic><topic>Estrus</topic><topic>Estrus Synchronization - methods</topic><topic>Female</topic><topic>Gonadotropin-Releasing Hormone - pharmacology</topic><topic>Insemination, Artificial - methods</topic><topic>Insemination, Artificial - veterinary</topic><topic>Lactation</topic><topic>Ovulation</topic><topic>Pregnancy</topic><topic>Pregnancy Rate</topic><topic>Progesterone - pharmacology</topic><topic>Timed AI</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Tschopp, Juan Carlos</creatorcontrib><creatorcontrib>Bó, Gabriel A.</creatorcontrib><collection>Medline</collection><collection>MEDLINE</collection><collection>MEDLINE (Ovid)</collection><collection>MEDLINE</collection><collection>MEDLINE</collection><collection>PubMed</collection><collection>CrossRef</collection><collection>MEDLINE - Academic</collection><jtitle>Animal reproduction science</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Tschopp, Juan Carlos</au><au>Bó, Gabriel A.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Success of artificial insemination based on expression of estrus and the addition of GnRH to an estradiol/progesterone-based protocol on pregnancy rates in lactating dairy cows</atitle><jtitle>Animal reproduction science</jtitle><addtitle>Anim Reprod Sci</addtitle><date>2022-03</date><risdate>2022</risdate><volume>238</volume><spage>106954</spage><epage>106954</epage><pages>106954-106954</pages><artnum>106954</artnum><issn>0378-4320</issn><eissn>1873-2232</eissn><abstract>Three experiments evaluated the effects of insemination based on estrus expression or treatment with GnRH, on the time of ovulation and pregnancy rates to AI (P/AI) in dairy cows. All cows were treated with a P4 device for 8 d, estradiol benzoate at device insertion and prostaglandin F2α, estradiol cypionate and eCG at device removal. In Experiment 1, P/AI was less (P < 0.01) when all cows were inseminated at 48 h after device removal (31%) than when cows showing estrus at 48 h were inseminated at that time and those not in estrus received GnRH and were inseminated 12 h later (53%). In Experiment 2, cows in estrus by 48 h ovulated earlier than cows that were not in estrus but received GnRH and those that did not receive GnRH. Cows that were in estrus and inseminated at 48 h (47.8%) and those not in estrus at 48 h but inseminated at 60 h (53.4%) had greater P/AI (P < 0.05) than cows that were in estrus at 48 h but were inseminated at 60 h (29.7%) or inseminated at 48 h in the absence of estrus (19.4%). In Experiment 3, GnRH treatment of cows not showing estrus at 48 h and inseminated at 60 h had greater P/AI (58.5%; P < 0.05) than those not treated with GnRH but inseminated at 60 h (39.5%). Artificial insemination based on estrus expression and the inclusion of GnRH in those not in estrus increased P/AI in lactating dairy cows.
•Modification of the time of insemination based on estrus expression improved P/AI in lactating dairy cows.•The greatest P/AI were obtained when cows in estrus by 48 h after P4 device removal were inseminated at that time whereas cows not in estrus at 48 h were inseminated 12 h later.•GnRH treatment to those cows that did not show estrus increased P/AI.</abstract><cop>Netherlands</cop><pub>Elsevier B.V</pub><pmid>35240469</pmid><doi>10.1016/j.anireprosci.2022.106954</doi><tpages>1</tpages></addata></record> |
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| subjects | Animals Cattle Dairy cows Dinoprost - pharmacology Estradiol - pharmacology Estrus Estrus Synchronization - methods Female Gonadotropin-Releasing Hormone - pharmacology Insemination, Artificial - methods Insemination, Artificial - veterinary Lactation Ovulation Pregnancy Pregnancy Rate Progesterone - pharmacology Timed AI |
| title | Success of artificial insemination based on expression of estrus and the addition of GnRH to an estradiol/progesterone-based protocol on pregnancy rates in lactating dairy cows |
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