The influence of time of insemination relative to time of ovulation on farrowing frequency and litter size in sows, as investigated by ultrasonography

Author： Nissen A.K.   Soede N.M.   Hyttel P.   Schmidt M.   D'Hoore L.  

Publisher： Elsevier

ISSN： 0093-691X

Source： Theriogenology, Vol.47, Iss.8, 1997-06, pp. : 1571-1582

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