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. 2014 Feb 18;8:53. doi: 10.3389/fnbeh.2014.00053

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Copyright © 2014 Brus, Meurisse, Keller and Lévy.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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Time table and protocol design. All ewes received four intravenous injections of BrdU (20 mg/kg, 1 injection/day) 4 months before sacrifice. In the two parturient groups (“With Lamb” and “No Lamb”), BrdU injections were performed 1 month after fecundation. In the ”With Lamb” group (n = 5), ewes could interact with her lamb and maternal behavior was observed at 0, 6 and 24 h after parturition for 10 min each and selectivity test was performed at 2 days postpartum just before sacrifice. In the “No Lamb” group (n = 6), lambs were removed just after delivery. Virgin group (n = 6) is composed of nulliparous ewes.