Cervical anatomy in sheep is the major limitation for the application of reproductive biotechnologies by non-surgical methods (Fonseca et al., 2016; Kershaw et al., 2005) and is highly variable among breeds (Kaabi et al., 2006). The successful cervical transposing is affected by complex anatomy of the cervical lumen and the difficulty of rectal manipulation of the reproductive tract. Furthermore, cervices with higher degree of convolutions and interdigitations are less penetrable by pipette/catheter (Kershaw et al., 2005). Pharmacological induction of cervical dilation is a crucial point to efficiently perform non-surgical embryo recovery (NSER) in sheep
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