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L’involution uterine est un facteur limitant pour la maitrise de la reproduction apres la parturition chez les chevres. L’objectif de cette etude est d’evaluer l’effet de la parite sur la dynamique de la resorption uterine par echographie chez dix-neuf (n=19) chevres du sahel reparties en deux groupes dont 11 primipares et 8 pluripares. Les examens ont ete pratiques par voie transrectale au moyen d’une sonde lineaire de 5 MHz a intervalle reguliers. Les durees moyennes de la resorption uterine complete sont de 21,87 ± 2,93 jours pour les primipares et de 22,75 ± 2,31 jours pour les pluripares. Ces delais n’ont pas ete significativement differents entre les deux groupes de femelles (p = 0,12). La resorption des caroncules uterines a ete complete au 15e jour dans les deux groupes (p = 0,29). Le profil de la resorption uterine suit trois phases de regression. Une forte regression a ete observee au cours de la premiere semaine (7,23 mm/jour et 6,54 mm/jour). La vitesse de resorption a ete moyenne (1,13 et 2,23 mm/jour) au cours de la deuxieme et troisieme semaine, et faible (0,25 et 0,23 mm/jour) a la quatrieme semaine dans les deux groupes (p=0,018). Les resorptions uterines chez les primipares et les pluripares suivent une regression de type logarithmique (R 1 2 = 0,98 et R 2 ² = 0,98) dont les equations respectives sont de Y 2 =-24,85ln(x) + 100,85 et Y 1 = -21,34ln(x) + 88,271. Chez la chevre du Sahel en elevage controle, la parite ne semble pas influencer la duree de la resorption uterine. © 2017 International Formulae Group. All rights reserved. Mots cles: Chevre, resorption uterine, parite, echographie, parturition English Title:  Dynamics of uterine resumption in sahelian goats: effect of parity English Abstract Uterine involution is a limited factor for the reproduction control after parturition in goats. The objective of this study is to evaluate the effect of parity on uterine resumption dynamic after parturition in nineteen (n = 19) Sahelian goats shared in two groups (primiparous (n= 11), pluriparous (n = 8)). Ultrasound examinations were carried out every two days transrectally by using a real time, B-mode ultrasound scanner with a linear-array transducer of 5.0 MHz. The means durations of complete uterine resumption were 21.87 ± 2.93 days in primiparous and 22.75 ± 2.31 days in pluriparous. However, times of complete uterine resumption in primiparous and pluriparous were not significantly different (p = 0.12). The resumption of uterine carunculars occurred completely at day 15 after parturition in all goats of the two groups (p = 0,29). Uterine resumption in Sahelian goats indicates three phases of regression in the two groups, acute regression (7.23 mm/day and 6.54 mm/day) in first week, moderate regression phase (1.13 and 2.23 mm/day) in second and third week, and low regression (0.25 and 0.21 mm/day) at fourth week. The uterine resumptions followed logarithmic regression modals (R12 = 0,97 and R2² = 0,98) which respective equations are: Y2=-24.85ln(x) + 100.85 and Y1 = -21.34ln(x) + 88.271 respectively in pluriparous and primiparous. In monitoring breed, parity does not affect time of uterine resumption after parturition in Sahelian goat. © 2017 International Formulae Group. All rights reserved. Keywords: Goat, uterine resumption, parity, ultrasound, parturition

Dynamique de la résorption utérine chez la chèvre du Sahel: effet de la parité