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To induce pseudopregnancy, 30 gilts or sows were given 20\u00a0mg intramuscular estradiol dipropionate (EDP) 10\u201311\u00a0days after the onset of estrus. Ten additional pigs were inseminated artificially at natural estrus as a control group. Prostaglandin F<jats:sub>2\u03b1<\/jats:sub> (PGF<jats:sub>2\u03b1<\/jats:sub>) was administered twice with a 24\u00a0hr interval beginning 15, 20, or 25\u00a0days after EDP\u2010treatment (<jats:italic>n<\/jats:italic>\u00a0=\u00a010 per group) or between 23 and 39\u00a0days after artificial insemination in control pigs. Following this, all pigs were given 1,000\u00a0IU equine chorionic gonadotropin and 500\u00a0IU human chorionic gonadotropin (hCG) and then inseminated. Embryos were recovered 6 or 7\u00a0days after hCG treatment and outcome was recorded. There was no significant difference in the number of normal embryos collected from the pigs with PGF<jats:sub>2\u03b1<\/jats:sub> initiated at different time points or from the control group. Embryonic developmental stages 7\u00a0days after hCG treatment also did not differ among groups. These results indicate that the use of EDP to induce pseudopregnancy, followed by PGF<jats:sub>2\u03b1<\/jats:sub> administration to synchronize estrus for subsequent embryo harvest, is a suitable alternative to the artificial abortion method.<\/jats:p>","DOI":"10.1111\/asj.13303","type":"journal-article","created":{"date-parts":[[2019,10,24]],"date-time":"2019-10-24T05:39:35Z","timestamp":1571895575000},"page":"1523-1529","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":7,"title":["Embryo collection from pigs post\u2010pseudopregnancy induced by estradiol dipropionate"],"prefix":"10.1111","volume":"90","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-2328-8417","authenticated-orcid":false,"given":"Yuri","family":"Hirayama","sequence":"first","affiliation":[{"name":"Department of Planning and Coordination National Livestock Breeding Center Fukushima Japan"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Koji","family":"Yoshioka","sequence":"additional","affiliation":[{"name":"Division of Pathology and Pathophysiology National Institute of Animal Health National Agriculture and Food Research Organization Ibaraki Japan"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Michiko","family":"Noguchi","sequence":"additional","affiliation":[{"name":"Department of Veterinary Medicine Azabu University Sagamihara Japan"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Koji","family":"Misumi","sequence":"additional","affiliation":[{"name":"Department of Planning and Coordination National Livestock Breeding Center Fukushima Japan"},{"name":"Department of Bioresource Sciences Nihon University Fujisawa Japan"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"311","published-online":{"date-parts":[[2019,10,23]]},"reference":[{"key":"e_1_2_7_2_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.theriogenology.2010.11.043"},{"key":"e_1_2_7_3_1","first-page":"1711","article-title":"Resistance of porcine preimplantation embryos to pseudo\u2010rabies virus","volume":"42","author":"Bolin S. 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