Endocrine responses in the llama to copulation
Nine adult female llamas were used to determine the time course for secretion of luteinizing hormone (LH) and estradiol-17β (E 2) following a single copulation (average 18 min), and progesterone (P 4) during the development of the subsequent luteal phase. Heparinized blood samples were obtained thro...
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| Veröffentlicht in: | Theriogenology 1990-04, Vol.33 (4), p.891-899 |
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| creator | Bravo, P.W. Fowler, M.E. Stabenfeldt, G.H. Lasley, B. |
| description | Nine adult female llamas were used to determine the time course for secretion of luteinizing hormone (LH) and estradiol-17β (E
2) following a single copulation (average 18 min), and progesterone (P
4) during the development of the subsequent luteal phase. Heparinized blood samples were obtained through an indwelling jugular cannula at 15-min intervals for up to 24 h following copulation and then once daily for up to 10 d. Luteinizing hormone, assayed by radioimmunoassay (RIA) using a monoclonal antibody 518B7 against the β subunit of bovine LH, was determined at 15 min intervals for 24 h following copulation. Estradiol-17β was determined by RIA at 4-h intervals following copulation, then daily, while P
4 values were determined daily by enzyme immunoassay. A significant increase in LH concentration was observed by 15 min after the onset of copulation, with the peak of the preovulatory surge of LH occurring at 2 h; values were basal by 7 h after copulation. Estradiol-17β values, unchanged through 18 h after copulation, tended to decline at 22 h (24 h, P |
| doi_str_mv | 10.1016/0093-691X(90)90824-D |
| format | Article |
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2) following a single copulation (average 18 min), and progesterone (P
4) during the development of the subsequent luteal phase. Heparinized blood samples were obtained through an indwelling jugular cannula at 15-min intervals for up to 24 h following copulation and then once daily for up to 10 d. Luteinizing hormone, assayed by radioimmunoassay (RIA) using a monoclonal antibody 518B7 against the β subunit of bovine LH, was determined at 15 min intervals for 24 h following copulation. Estradiol-17β was determined by RIA at 4-h intervals following copulation, then daily, while P
4 values were determined daily by enzyme immunoassay. A significant increase in LH concentration was observed by 15 min after the onset of copulation, with the peak of the preovulatory surge of LH occurring at 2 h; values were basal by 7 h after copulation. Estradiol-17β values, unchanged through 18 h after copulation, tended to decline at 22 h (24 h, P<0.10) and were significantly lower than 18 h values by 48 h (P<0.05) after copulation. The first significant P
4 increase occurred at 3 d after copulation, with values increasing through 10 d. The LH surge observed subsequent to copulation is consonant with the llama being an induced ovulator.</description><identifier>ISSN: 0093-691X</identifier><identifier>EISSN: 1879-3231</identifier><identifier>DOI: 10.1016/0093-691X(90)90824-D</identifier><identifier>PMID: 16726785</identifier><language>eng</language><publisher>United States: Elsevier Inc</publisher><subject>COPULA ; COPULATION ; ESTROGENOS ; GONADOTROPHINE ; gonadotrophins ; GONADOTROPINAS ; GONADOTROPINS ; HORMONAS ; HORMONE ; HORMONES ; LAMA ; LLAMA ; LLAMAS ; OESTROGENE ; OESTROGENS ; OVULACION ; OVULATION ; PROGESTERONA ; PROGESTERONE ; SECRECION ; SECRETION ; steroids</subject><ispartof>Theriogenology, 1990-04, Vol.33 (4), p.891-899</ispartof><rights>1990</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c380t-5ce571a98fe382fb655763ae072f9604d8f483df6c596bcd35fb93722dedff7e3</citedby><cites>FETCH-LOGICAL-c380t-5ce571a98fe382fb655763ae072f9604d8f483df6c596bcd35fb93722dedff7e3</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://dx.doi.org/10.1016/0093-691X(90)90824-D$$EHTML$$P50$$Gelsevier$$H</linktohtml><link.rule.ids>314,780,784,3548,27923,27924,45994</link.rule.ids><backlink>$$Uhttps://www.ncbi.nlm.nih.gov/pubmed/16726785$$D View this record in MEDLINE/PubMed$$Hfree_for_read</backlink></links><search><creatorcontrib>Bravo, P.W.</creatorcontrib><creatorcontrib>Fowler, M.E.</creatorcontrib><creatorcontrib>Stabenfeldt, G.H.</creatorcontrib><creatorcontrib>Lasley, B.</creatorcontrib><title>Endocrine responses in the llama to copulation</title><title>Theriogenology</title><addtitle>Theriogenology</addtitle><description>Nine adult female llamas were used to determine the time course for secretion of luteinizing hormone (LH) and estradiol-17β (E
2) following a single copulation (average 18 min), and progesterone (P
4) during the development of the subsequent luteal phase. Heparinized blood samples were obtained through an indwelling jugular cannula at 15-min intervals for up to 24 h following copulation and then once daily for up to 10 d. Luteinizing hormone, assayed by radioimmunoassay (RIA) using a monoclonal antibody 518B7 against the β subunit of bovine LH, was determined at 15 min intervals for 24 h following copulation. Estradiol-17β was determined by RIA at 4-h intervals following copulation, then daily, while P
4 values were determined daily by enzyme immunoassay. A significant increase in LH concentration was observed by 15 min after the onset of copulation, with the peak of the preovulatory surge of LH occurring at 2 h; values were basal by 7 h after copulation. Estradiol-17β values, unchanged through 18 h after copulation, tended to decline at 22 h (24 h, P<0.10) and were significantly lower than 18 h values by 48 h (P<0.05) after copulation. The first significant P
4 increase occurred at 3 d after copulation, with values increasing through 10 d. The LH surge observed subsequent to copulation is consonant with the llama being an induced ovulator.</description><subject>COPULA</subject><subject>COPULATION</subject><subject>ESTROGENOS</subject><subject>GONADOTROPHINE</subject><subject>gonadotrophins</subject><subject>GONADOTROPINAS</subject><subject>GONADOTROPINS</subject><subject>HORMONAS</subject><subject>HORMONE</subject><subject>HORMONES</subject><subject>LAMA</subject><subject>LLAMA</subject><subject>LLAMAS</subject><subject>OESTROGENE</subject><subject>OESTROGENS</subject><subject>OVULACION</subject><subject>OVULATION</subject><subject>PROGESTERONA</subject><subject>PROGESTERONE</subject><subject>SECRECION</subject><subject>SECRETION</subject><subject>steroids</subject><issn>0093-691X</issn><issn>1879-3231</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>1990</creationdate><recordtype>article</recordtype><recordid>eNp9kE1LxDAQhoMouq7-ARHpTT10TZo2aS6C7K4fsOBBF7yFNJloZNvUpBX893bdRW-e5vA-78zwIHRK8IRgwq4wFjRlgrxcCHwpcJnl6WwHjUjJRUozSnbR6Bc5QIcxvmOMKWNkHx0QxjPGy2KEJvPGeB1cA0mA2PomQkxck3RvkKxWqlZJ5xPt236lOuebI7Rn1SrC8XaO0fJ2_jy9TxePdw_Tm0WqaYm7tNBQcKJEaYGWma1YUXBGFWCeWcFwbkqbl9RYpgvBKm1oYStBeZYZMNZyoGN0vtnbBv_RQ-xk7aKG4aMGfB8lpznBXORiIPMNqYOPMYCVbXC1Cl-SYLkWJdcW5NqCFFj-iJKzoXa2PdBXNZi_0tbMAJxsAKu8VK_BRbl8EjgvMp4P4fUmhMHBp4Mgo3bQaDAugO6k8e7_89-P-3-F</recordid><startdate>19900401</startdate><enddate>19900401</enddate><creator>Bravo, P.W.</creator><creator>Fowler, M.E.</creator><creator>Stabenfeldt, G.H.</creator><creator>Lasley, B.</creator><general>Elsevier Inc</general><scope>FBQ</scope><scope>NPM</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7X8</scope></search><sort><creationdate>19900401</creationdate><title>Endocrine responses in the llama to copulation</title><author>Bravo, P.W. ; Fowler, M.E. ; Stabenfeldt, G.H. ; Lasley, B.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c380t-5ce571a98fe382fb655763ae072f9604d8f483df6c596bcd35fb93722dedff7e3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>1990</creationdate><topic>COPULA</topic><topic>COPULATION</topic><topic>ESTROGENOS</topic><topic>GONADOTROPHINE</topic><topic>gonadotrophins</topic><topic>GONADOTROPINAS</topic><topic>GONADOTROPINS</topic><topic>HORMONAS</topic><topic>HORMONE</topic><topic>HORMONES</topic><topic>LAMA</topic><topic>LLAMA</topic><topic>LLAMAS</topic><topic>OESTROGENE</topic><topic>OESTROGENS</topic><topic>OVULACION</topic><topic>OVULATION</topic><topic>PROGESTERONA</topic><topic>PROGESTERONE</topic><topic>SECRECION</topic><topic>SECRETION</topic><topic>steroids</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Bravo, P.W.</creatorcontrib><creatorcontrib>Fowler, M.E.</creatorcontrib><creatorcontrib>Stabenfeldt, G.H.</creatorcontrib><creatorcontrib>Lasley, B.</creatorcontrib><collection>AGRIS</collection><collection>PubMed</collection><collection>CrossRef</collection><collection>MEDLINE - Academic</collection><jtitle>Theriogenology</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Bravo, P.W.</au><au>Fowler, M.E.</au><au>Stabenfeldt, G.H.</au><au>Lasley, B.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Endocrine responses in the llama to copulation</atitle><jtitle>Theriogenology</jtitle><addtitle>Theriogenology</addtitle><date>1990-04-01</date><risdate>1990</risdate><volume>33</volume><issue>4</issue><spage>891</spage><epage>899</epage><pages>891-899</pages><issn>0093-691X</issn><eissn>1879-3231</eissn><abstract>Nine adult female llamas were used to determine the time course for secretion of luteinizing hormone (LH) and estradiol-17β (E
2) following a single copulation (average 18 min), and progesterone (P
4) during the development of the subsequent luteal phase. Heparinized blood samples were obtained through an indwelling jugular cannula at 15-min intervals for up to 24 h following copulation and then once daily for up to 10 d. Luteinizing hormone, assayed by radioimmunoassay (RIA) using a monoclonal antibody 518B7 against the β subunit of bovine LH, was determined at 15 min intervals for 24 h following copulation. Estradiol-17β was determined by RIA at 4-h intervals following copulation, then daily, while P
4 values were determined daily by enzyme immunoassay. A significant increase in LH concentration was observed by 15 min after the onset of copulation, with the peak of the preovulatory surge of LH occurring at 2 h; values were basal by 7 h after copulation. Estradiol-17β values, unchanged through 18 h after copulation, tended to decline at 22 h (24 h, P<0.10) and were significantly lower than 18 h values by 48 h (P<0.05) after copulation. The first significant P
4 increase occurred at 3 d after copulation, with values increasing through 10 d. The LH surge observed subsequent to copulation is consonant with the llama being an induced ovulator.</abstract><cop>United States</cop><pub>Elsevier Inc</pub><pmid>16726785</pmid><doi>10.1016/0093-691X(90)90824-D</doi><tpages>9</tpages></addata></record> |
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| ispartof | Theriogenology, 1990-04, Vol.33 (4), p.891-899 |
| issn | 0093-691X 1879-3231 |
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| source | ScienceDirect Journals (5 years ago - present) |
| subjects | COPULA COPULATION ESTROGENOS GONADOTROPHINE gonadotrophins GONADOTROPINAS GONADOTROPINS HORMONAS HORMONE HORMONES LAMA LLAMA LLAMAS OESTROGENE OESTROGENS OVULACION OVULATION PROGESTERONA PROGESTERONE SECRECION SECRETION steroids |
| title | Endocrine responses in the llama to copulation |
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