The anatomy of the sheep cervix and its influence on the transcervical passage of an inseminating pipette into the uterine lumen
作者:Claire M.Kershaw;MuhammadKhalid;Michael R.McGowan;KateIngram;SukanyaLeethongdee;GabrieleWax;Rex J.Scaramuzzi;
DOI:10.1016/j.theriogenology.2005.02.017