El Khalil Kaoutar, Allai Larbi, Fatet Alice, Benmoula Anass, Hamidallah Naima, Badi Abdelmoughit, Moussafir Zineb, Ibnelbachyr Mustapha, El Amiri Bouchra
INRA-Centre Régional de la Recherche Agronomique de Settat, BP589, Settat, Morocco; Laboratoire de Biochimie Neurosciences, Faculté des Sciences et Techniques, Université Hassan1, BP 577, 26000 Settat, Morocco.
INRA-Centre Régional de la Recherche Agronomique de Settat, BP589, Settat, Morocco.
Anim Reprod Sci. 2018 Sep;196:43-47. doi: 10.1016/j.anireprosci.2018.06.017. Epub 2018 Jun 30.
The ewe's cervix structure is highly variable among females, which may limit the application of transcervical artificial insemination (TCAI). This work aimed to study the variation in cervix anatomy in two different prolificacy breeds (D'man a prolific and Boujaâd a non-prolific sheep). Reproductive tracts were collected from D'man (n = 64) and Boujaâd (n = 187) females aged between 1 and 4 years. The weight of the uterus, length of the cervix and depth of penetration of the inseminating pipette were recorded. The number of cervical rings was counted and their arrangement graded. The cervix anatomy of D'man ewes differs from that of Boujaâd. The cervix morphology of Boujaâd ewes is more complex compared to D'man ewes; this complexity depends on the age of the ewe. No significant difference was found regarding the depth of penetration of the insemination catheter for the two breeds at 1, 2 and 4 years old (P > 0.05). However, at 3 years old, the highest depth of penetration (P < 0.05) was recorded in D'man ewes. In addition, for both breeds, grade 2 was the most frequent (P < 0.05), and the cervix became less complicated for TCAI with advanced age (4 years old). To conclude, the cervix of D'man ewes is less complex and more favorable to TCAI. In addition, to overcome the complexity of the cervix in Boujaâd sheep, a selection of 4-year-old ewes will make the penetration of the artificial insemination catheter possible.
母羊的子宫颈结构在不同个体间差异很大，这可能会限制经子宫颈人工授精（TCAI）的应用。本研究旨在探讨两种不同繁殖力品种（多产的德芒羊和非多产的布贾阿德羊）子宫颈解剖结构的差异。采集了1至4岁的德芒羊（n = 64）和布贾阿德羊（n = 187）的生殖道。记录子宫重量、子宫颈长度和授精吸管的插入深度。计算子宫颈环的数量并对其排列进行分级。德芒羊的子宫颈解剖结构与布贾阿德羊不同。与德芒羊相比，布贾阿德羊的子宫颈形态更为复杂；这种复杂性取决于母羊的年龄。在1岁、2岁和4岁时，两个品种的授精导管插入深度没有显著差异（P>0.05）。然而，在3岁时，德芒羊的插入深度最高（P<0.05）。此外，对于两个品种，2级最为常见（P<0.05），随着年龄增长（4岁），子宫颈对于TCAI来说变得不那么复杂。总之，德芒羊的子宫颈较不复杂，更有利于TCAI。此外，为克服布贾阿德羊子宫颈的复杂性，选择4岁的母羊将使人工授精导管的插入成为可能。
