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A total of 21 cross\u2010bred Sarda x Lacaune ewes homogeneous for age, parity and stage of lactation were included. The ewes were stratified as high\u2010producing or low\u2010producing based on their genetic merit for milk production estimated by a pentatrait repeatability animal model. Oestrus was synchronized using an intravaginal progesterone pessary inserted on Day 0 and removed on Day 14. Superovulatory treatment consisted of 350 I.U. of porcine <jats:styled-content style=\"fixed-case\">FSH<\/jats:styled-content> administered in eight decreasing intramuscular doses every 12 hr with a total dose of 10\u00a0ml of solution starting 12 days after insertion of sponges. Laparoscopic artificial insemination (<jats:styled-content style=\"fixed-case\">AI<\/jats:styled-content>) was performed 48\u00a0hr after pessary removal. Surgical embryo recovery was performed at Day 8 after pessary removal. Correlation between breeding value for milk production and the number of corpora lutea (<jats:styled-content style=\"fixed-case\">CL<\/jats:styled-content>) was significantly different from zero (\u22120.49). High\u2010producing ewes had a lower number of <jats:styled-content style=\"fixed-case\">CL<\/jats:styled-content> than low\u2010producing counterparts (7.6\u00a0\u00b1\u00a02.50 vs 12.1\u00a0\u00b1\u00a05.16 respectively; <jats:italic>p<\/jats:italic>\u00a0&lt;\u00a0.02). Furthermore, there was a tendency for high\u2010producing ewes to yield fewer embryos than low\u2010producing females (5.3\u00a0\u00b1\u00a03.46 vs 9.18\u00a0\u00b1\u00a05.11; <jats:italic>p<\/jats:italic>\u00a0=\u00a0.09). No differences were observed between ewes in both genetic groups with regard to the number of embryos of grades 1, 2 and 3. To our knowledge, this is the first report highlighting an antagonism between genetic merit for milk production and the ability to produce embryos in sheep. These results deserve to be considered in sheep breeding programmes.<\/jats:p>","DOI":"10.1111\/rda.12983","type":"journal-article","created":{"date-parts":[[2017,4,29]],"date-time":"2017-04-29T17:30:21Z","timestamp":1493487021000},"page":"814-818","source":"Crossref","is-referenced-by-count":4,"title":["High\u2010milking sheep have a lower ovulation rate and tend to yield fewer embryos in response to superovulation and intrauterine artificial insemination"],"prefix":"10.1111","volume":"52","author":[{"given":"A","family":"Mera\u00ef","sequence":"first","affiliation":[{"name":"Animal Science Department National Agronomic Institute of Tunisia University of Carthage  Tunis Tunisia"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"M","family":"Dattena","sequence":"additional","affiliation":[{"name":"Agris\u2010Sardegna Servizio Ricerca per la Zootecnica  Olmedo (SS) Italy"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"S","family":"Casu","sequence":"additional","affiliation":[{"name":"Agris\u2010Sardegna Servizio Ricerca per la Zootecnica  Olmedo (SS) Italy"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-7455-2017","authenticated-orcid":false,"given":"M","family":"Rekik","sequence":"additional","affiliation":[{"name":"International Center for Agricultural Research in the Dry Areas (ICARDA) ICARDA\u2010Jordan Office  Amman Jordan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"N","family":"Lassoued","sequence":"additional","affiliation":[{"name":"Laboratoire des Productions Animales et Fourrag\u00e8res Institut National de la Recherche Agronomique de Tunisie  Ariana Tunisia"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"311","published-online":{"date-parts":[[2017,4,29]]},"reference":[{"key":"e_1_2_9_2_1","first-page":"16","article-title":"Determination of relationship between milk production and the quality of embryo of donor cows","volume":"81","author":"Ayasan T.","year":"2011","journal-title":"Indian Journal of Animal Sciences"},{"key":"e_1_2_9_3_1","unstructured":"Baril G. 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