{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,22]],"date-time":"2026-10-22T17:44:39Z","timestamp":1792691079853,"version":"4.5.0"},"reference-count":12,"publisher":"Oxford University Press (OUP)","issue":"3","license":[{"start":{"date-parts":[[2011,3,1]],"date-time":"2011-03-01T00:00:00Z","timestamp":1298937600000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/academic.oup.com\/pages\/standard-publication-reuse-rights"}],"content-domain":{"domain":["rep.bioscientifica.com"],"crossmark-restriction":true},"short-container-title":[],"published-print":{"date-parts":[[2011,3,1]]},"abstract":"<jats:title>Abstract<\/jats:title>\n                  <jats:p>Fertility of lactating dairy cows is associated with reduced progesterone (P4) concentration compared with nonlactating animals. The objective of the current study was to determine whether P4 during growth of the first follicular wave (FFW) affects embryo quality. Lactating Holstein cows at 33\u00b13 days post partum were allocated to one of three treatments. Cows in the FFW and FFW with P4 (FFWP) treatments started the superstimulation protocol on day 1 of the estrous cycle and second follicular wave (SFW) cows started the superstimulation protocol on estrous cycle day 7. Cows were superstimulated with 400\u200amg of NIH-FSH-P1 (FSH) given twice daily for 5 days, two prostaglandin F2\u03b1 (PGF2\u03b1) injections given with the ninth and tenth injections of FSH, GNRH given 48\u200ah after the first PGF2\u03b1 injection, and timed insemination 12 and 24\u200ah after the GNRH injection. Cows in the FFWP treatment received two intravaginal P4 inserts during the superstimulation. Embryos were recovered 6.5 days after artificial insemination and excellent\/good and fair embryos were frozen and transferred. Blood was sampled daily from estrous cycle day 0 until insemination from donor cows. During the superstimulation protocol, P4 was (P&amp;lt;0.01) greatest for SFW cows followed by FFWP and FFW cows respectively. The percentage of embryos\u2013oocytes from SFW and FFWP cows classified as excellent\/good and fair embryos was (P=0.02) greater than those of FFW cows. Pregnancy per embryo transfer was not (P\u22650.73) affected by embryo donor treatment. Reduced embryo quality of cows induced to ovulate the follicles from the first follicular wave is a consequence of reduced P4 during follicle growth.<\/jats:p>","DOI":"10.1530\/rep-10-0375","type":"journal-article","created":{"date-parts":[[2010,12,22]],"date-time":"2010-12-22T22:11:37Z","timestamp":1293055897000},"page":"333-342","update-policy":"https:\/\/doi.org\/10.1530\/crossmarkpolicy-1","source":"Crossref","is-referenced-by-count":128,"title":["Reduced progesterone concentration during growth of the first follicular wave affects embryo quality but has no effect on embryo survival post transfer in lactating dairy cows"],"prefix":"10.1093","volume":"141","author":[{"given":"Fernando A","family":"Rivera","sequence":"first","affiliation":[{"name":"School of Veterinary Medicine University of California Davis, Tulare, California 93274, USA 2Department of Veterinary Population Medicine University of Minnesota, Saint Paul, Minnesota 55108, USA 3Department of Animal Sciences University of Florida, Gainesville, Florida 32611, USA 4Department of Animal Science Texas A&M University, College Station, Texas 77843, USA 5Instituto de Ciencias Agr\u00edcolas Universidad Autonoma Baja California, Baja California 21705, Mexico"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Lu\u00eds G D","family":"Mendon\u00e7a","sequence":"additional","affiliation":[{"name":"School of Veterinary Medicine University of California Davis, Tulare, California 93274, USA 2Department of Veterinary Population Medicine University of Minnesota, Saint Paul, Minnesota 55108, USA 3Department of Animal Sciences University of Florida, Gainesville, Florida 32611, USA 4Department of Animal Science Texas A&M University, College Station, Texas 77843, USA 5Instituto de Ciencias Agr\u00edcolas Universidad Autonoma Baja California, Baja California 21705, Mexico"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"suffix":"Jr","given":"Gl\u00e1ucio","family":"Lopes","sequence":"additional","affiliation":[{"name":"School of Veterinary Medicine University of California Davis, Tulare, California 93274, USA 2Department of Veterinary Population Medicine University of Minnesota, Saint Paul, Minnesota 55108, USA 3Department of Animal Sciences University of Florida, Gainesville, Florida 32611, USA 4Department of Animal Science Texas A&M University, College Station, Texas 77843, USA 5Instituto de Ciencias Agr\u00edcolas Universidad Autonoma Baja California, Baja California 21705, Mexico"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jos\u00e9 E P","family":"Santos","sequence":"additional","affiliation":[{"name":"School of Veterinary Medicine University of California Davis, Tulare, California 93274, USA 2Department of Veterinary Population Medicine University of Minnesota, Saint Paul, Minnesota 55108, USA 3Department of Animal Sciences University of Florida, Gainesville, Florida 32611, USA 4Department of Animal Science Texas A&M University, College Station, Texas 77843, USA 5Instituto de Ciencias Agr\u00edcolas Universidad Autonoma Baja California, Baja California 21705, Mexico"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Rolando V","family":"Perez","sequence":"additional","affiliation":[{"name":"School of Veterinary Medicine University of California Davis, Tulare, California 93274, USA 2Department of Veterinary Population Medicine University of Minnesota, Saint Paul, Minnesota 55108, USA 3Department of Animal Sciences University of Florida, Gainesville, Florida 32611, USA 4Department of Animal Science Texas A&M University, College Station, Texas 77843, USA 5Instituto de Ciencias Agr\u00edcolas Universidad Autonoma Baja California, Baja California 21705, Mexico"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Marcel","family":"Amstalden","sequence":"additional","affiliation":[{"name":"School of Veterinary Medicine University of California Davis, Tulare, California 93274, USA 2Department of Veterinary Population Medicine University of Minnesota, Saint Paul, Minnesota 55108, USA 3Department of Animal Sciences University of Florida, Gainesville, Florida 32611, USA 4Department of Animal Science Texas A&M University, College Station, Texas 77843, USA 5Instituto de Ciencias Agr\u00edcolas Universidad Autonoma Baja California, Baja California 21705, Mexico"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Abelardo","family":"Correa-Calder\u00f3n","sequence":"additional","affiliation":[{"name":"School of Veterinary Medicine University of California Davis, Tulare, California 93274, USA 2Department of Veterinary Population Medicine University of Minnesota, Saint Paul, Minnesota 55108, USA 3Department of Animal 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