References

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Halbert, G.W., H. Dobson, J.S. Walton and B.C. Buckrell, 1990. The structure of the cervical canal of the ewe. Theriogenology, 33: 977-992.
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Kaabi, M., M. Alvarez, E. Anel, C.A. Chamorro, J.C. Boixo, P. De Paz and L. Anel, 2006. Influence of breed and age on morphometry and depth of inseminating catheter penetration in the ewe cervix: A postmortem study. Theriogenology, 66: 1876-1883.
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Kershaw-Young, C.M., M. Khalid, M.R. McGowan, K. Ingram, S. Leethongdee, G. Wax and R.J. Scaramuzzi, 2005. The anatomy of the sheep cervix and its influence on the transcervical passage of an inseminating pipette into the uterine lumen. Theriogenology, 64: 1225-1235.
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Naqvi, S.M., G.K. Pandey, K.K. Gautam, A. Joshi, V. Geethalakshmi and J.P. Mittal, 2005. Evaluation of gross anatomical features of cervix of tropical sheep using cervical silicone moulds. Anim. Reprod. Sci., 85: 337-344.
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Salamon, S. and W.M.C. Maxwell, 1995. Frozen storage of ram semen I. Processing, freezing, thawing and fertility after cervical insemination. Anim. Reprod. Sci., 37: 185-249.
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Salamon, S. and W.M.C. Maxwell, 1995. Frozen storage of ram semen II. Causes of low fertility after cervical insemination and methods of improvement. Anim. Reprod. Sci., 38: 1-36.
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Wulster-Radcliffe, M.C., S. Wang and G.S. Lewis, 2004. Transcervical artificial insemination in sheep: Effects of a new transcervical artificial insemination instrument and traversing the cervix on pregnancy and lambing rates. Theriogenology, 62: 990-1002.
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