By Nichols J.E.   Higdon H.L.   Crane M.M.   Boone W.R.   in Fertility and Sterility

ISSN:0015-0282|76|1|80-84

Elsevier‎(2001)‎

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By Higdon H.L.   Spitzer J.C.   Hopkins F.M.   Bridges W.C.   in Theriogenology

ISSN:0093-691X|53|6|1321-1332

Elsevier‎(2000)‎

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By Kennedy S.P.   Spitzer J.C.   Hopkins F.M.   Higdon H.L.   Bridges W.C.   in Theriogenology

ISSN:0093-691X|58|5|947-961

Elsevier‎(2002)‎

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By Nichols J.E.   Crane M.M.   Higdon H.L.   Miller P.B.   Boone W.R.   in Fertility and Sterility

ISSN:0015-0282|79|3|645-647

Elsevier‎(2003)‎

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