Plasma estrogen levels during pregnancy in the western spotted skunk
The present study was undertaken to obtain an estrogen profile throughout gestation in the western spotted skunk with special emphasis on relating changes in estrogen levels to blastocyst development. Blood samples were collected from 130 pregnant animals by cardiac puncture and plasma estrogen leve...
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| Veröffentlicht in: | Biology of reproduction 1984-06, Vol.30 (5), p.1153-1159 |
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| container_title | Biology of reproduction |
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| creator | RAVINDRA, R MEAD, R. A |
| description | The present study was undertaken to obtain an estrogen profile throughout gestation in the western spotted skunk with special
emphasis on relating changes in estrogen levels to blastocyst development. Blood samples were collected from 130 pregnant
animals by cardiac puncture and plasma estrogen levels were determined by radioimmunoassay (RIA). Estrogen levels varied throughout
the period of embryonic diapause, with mean levels ranging between 3 to 18 pg/ml. There was a tendency for estrogen levels
to be less variable and somewhat lower during the 15 days immediately prior to blastocyst implantation than during the preceding
period. Plasma estrogen levels in skunks with delayed implanting blastocysts (diameters of 1.1 mm or less) were significantly
higher (P less than 0.05) than those in females with activating blastocysts (i.e., diameters of 1.2 mm or greater), again
suggesting that estrogen levels were reduced during the period immediately preceding implantation. However, the exact physiological
significance, if any, of this modest reduction in estrogen levels remains to be determined. |
| doi_str_mv | 10.1095/biolreprod30.5.1153 |
| format | Article |
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emphasis on relating changes in estrogen levels to blastocyst development. Blood samples were collected from 130 pregnant
animals by cardiac puncture and plasma estrogen levels were determined by radioimmunoassay (RIA). Estrogen levels varied throughout
the period of embryonic diapause, with mean levels ranging between 3 to 18 pg/ml. There was a tendency for estrogen levels
to be less variable and somewhat lower during the 15 days immediately prior to blastocyst implantation than during the preceding
period. Plasma estrogen levels in skunks with delayed implanting blastocysts (diameters of 1.1 mm or less) were significantly
higher (P less than 0.05) than those in females with activating blastocysts (i.e., diameters of 1.2 mm or greater), again
suggesting that estrogen levels were reduced during the period immediately preceding implantation. However, the exact physiological
significance, if any, of this modest reduction in estrogen levels remains to be determined.</description><identifier>ISSN: 0006-3363</identifier><identifier>EISSN: 1529-7268</identifier><identifier>DOI: 10.1095/biolreprod30.5.1153</identifier><identifier>PMID: 6733207</identifier><identifier>CODEN: BIREBV</identifier><language>eng</language><publisher>Madison, WI: Society for the Study of Reproduction</publisher><subject>Animals ; Biological and medical sciences ; Blastocyst - physiology ; Carnivora - blood ; Embryonic Development ; Estrogens - blood ; Female ; Fundamental and applied biological sciences. Psychology ; Mephitidae - blood ; Mother. Fetoplacental unit. Mammary gland. Milk ; Pregnancy ; Pregnancy, Animal ; Pregnancy. Parturition. Lactation ; Vertebrates: reproduction</subject><ispartof>Biology of reproduction, 1984-06, Vol.30 (5), p.1153-1159</ispartof><rights>1985 INIST-CNRS</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c360t-bf0ab837b9c69bd959d06ce4d5f305de195091ecf06509a91eddcdc48057a22a3</citedby></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>314,776,780,27901,27902</link.rule.ids><backlink>$$Uhttp://pascal-francis.inist.fr/vibad/index.php?action=getRecordDetail&idt=9085504$$DView record in Pascal Francis$$Hfree_for_read</backlink><backlink>$$Uhttps://www.ncbi.nlm.nih.gov/pubmed/6733207$$D View this record in MEDLINE/PubMed$$Hfree_for_read</backlink></links><search><creatorcontrib>RAVINDRA, R</creatorcontrib><creatorcontrib>MEAD, R. A</creatorcontrib><title>Plasma estrogen levels during pregnancy in the western spotted skunk</title><title>Biology of reproduction</title><addtitle>Biol Reprod</addtitle><description>The present study was undertaken to obtain an estrogen profile throughout gestation in the western spotted skunk with special
emphasis on relating changes in estrogen levels to blastocyst development. Blood samples were collected from 130 pregnant
animals by cardiac puncture and plasma estrogen levels were determined by radioimmunoassay (RIA). Estrogen levels varied throughout
the period of embryonic diapause, with mean levels ranging between 3 to 18 pg/ml. There was a tendency for estrogen levels
to be less variable and somewhat lower during the 15 days immediately prior to blastocyst implantation than during the preceding
period. Plasma estrogen levels in skunks with delayed implanting blastocysts (diameters of 1.1 mm or less) were significantly
higher (P less than 0.05) than those in females with activating blastocysts (i.e., diameters of 1.2 mm or greater), again
suggesting that estrogen levels were reduced during the period immediately preceding implantation. However, the exact physiological
significance, if any, of this modest reduction in estrogen levels remains to be determined.</description><subject>Animals</subject><subject>Biological and medical sciences</subject><subject>Blastocyst - physiology</subject><subject>Carnivora - blood</subject><subject>Embryonic Development</subject><subject>Estrogens - blood</subject><subject>Female</subject><subject>Fundamental and applied biological sciences. Psychology</subject><subject>Mephitidae - blood</subject><subject>Mother. Fetoplacental unit. Mammary gland. Milk</subject><subject>Pregnancy</subject><subject>Pregnancy, Animal</subject><subject>Pregnancy. Parturition. Lactation</subject><subject>Vertebrates: reproduction</subject><issn>0006-3363</issn><issn>1529-7268</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>1984</creationdate><recordtype>article</recordtype><sourceid>EIF</sourceid><recordid>eNpNkE1PwzAMhiMEgvHxCxBSDohbh9MsbXNE41OaBAc4R2nibmVZO5KWav-eTJsAX2zJr1_bDyGXDMYMpLgt69Z5XPvWchiLMWOCH5ARE6lM8jQrDskIALKE84yfkNMQPgHYhKf8mBxnOecp5CNy_-Z0WGmKofPtHBvq8BtdoLb3dTOna4_zRjdmQ-uGdgukQxSib2hYt12HloZl3yzPyVGlXcCLfT4jH48P79PnZPb69DK9myWGZ9AlZQW6LHheSpPJ0kohLWQGJ1ZUHIRFJgVIhqaCLBY6ltYaayYFiFynqeZn5GbnG3_-6uMlalUHg87pBts-qIJtQxRRyHdC49sQPFZq7euV9hvFQG3Zqf_slFBbdnHqam_flyu0vzN7WLF_ve_rYLSrfARTh1-ZhEIImPxduajni6H2qCJg56IpV8Mw_O37AaJjiCE</recordid><startdate>198406</startdate><enddate>198406</enddate><creator>RAVINDRA, R</creator><creator>MEAD, R. A</creator><general>Society for the Study of Reproduction</general><scope>IQODW</scope><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>198406</creationdate><title>Plasma estrogen levels during pregnancy in the western spotted skunk</title><author>RAVINDRA, R ; MEAD, R. A</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c360t-bf0ab837b9c69bd959d06ce4d5f305de195091ecf06509a91eddcdc48057a22a3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>1984</creationdate><topic>Animals</topic><topic>Biological and medical sciences</topic><topic>Blastocyst - physiology</topic><topic>Carnivora - blood</topic><topic>Embryonic Development</topic><topic>Estrogens - blood</topic><topic>Female</topic><topic>Fundamental and applied biological sciences. Psychology</topic><topic>Mephitidae - blood</topic><topic>Mother. Fetoplacental unit. Mammary gland. Milk</topic><topic>Pregnancy</topic><topic>Pregnancy, Animal</topic><topic>Pregnancy. Parturition. Lactation</topic><topic>Vertebrates: reproduction</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>RAVINDRA, R</creatorcontrib><creatorcontrib>MEAD, R. A</creatorcontrib><collection>Pascal-Francis</collection><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>Biology of reproduction</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>RAVINDRA, R</au><au>MEAD, R. A</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Plasma estrogen levels during pregnancy in the western spotted skunk</atitle><jtitle>Biology of reproduction</jtitle><addtitle>Biol Reprod</addtitle><date>1984-06</date><risdate>1984</risdate><volume>30</volume><issue>5</issue><spage>1153</spage><epage>1159</epage><pages>1153-1159</pages><issn>0006-3363</issn><eissn>1529-7268</eissn><coden>BIREBV</coden><abstract>The present study was undertaken to obtain an estrogen profile throughout gestation in the western spotted skunk with special
emphasis on relating changes in estrogen levels to blastocyst development. Blood samples were collected from 130 pregnant
animals by cardiac puncture and plasma estrogen levels were determined by radioimmunoassay (RIA). Estrogen levels varied throughout
the period of embryonic diapause, with mean levels ranging between 3 to 18 pg/ml. There was a tendency for estrogen levels
to be less variable and somewhat lower during the 15 days immediately prior to blastocyst implantation than during the preceding
period. Plasma estrogen levels in skunks with delayed implanting blastocysts (diameters of 1.1 mm or less) were significantly
higher (P less than 0.05) than those in females with activating blastocysts (i.e., diameters of 1.2 mm or greater), again
suggesting that estrogen levels were reduced during the period immediately preceding implantation. However, the exact physiological
significance, if any, of this modest reduction in estrogen levels remains to be determined.</abstract><cop>Madison, WI</cop><pub>Society for the Study of Reproduction</pub><pmid>6733207</pmid><doi>10.1095/biolreprod30.5.1153</doi><tpages>7</tpages></addata></record> |
| fulltext | fulltext |
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| ispartof | Biology of reproduction, 1984-06, Vol.30 (5), p.1153-1159 |
| issn | 0006-3363 1529-7268 |
| language | eng |
| recordid | cdi_proquest_miscellaneous_81111158 |
| source | MEDLINE; Elektronische Zeitschriftenbibliothek - Frei zugängliche E-Journals |
| subjects | Animals Biological and medical sciences Blastocyst - physiology Carnivora - blood Embryonic Development Estrogens - blood Female Fundamental and applied biological sciences. Psychology Mephitidae - blood Mother. Fetoplacental unit. Mammary gland. Milk Pregnancy Pregnancy, Animal Pregnancy. Parturition. Lactation Vertebrates: reproduction |
| title | Plasma estrogen levels during pregnancy in the western spotted skunk |
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