TY - JOUR AU - Kirkwood, RN TI - Increasing the predictability of cloprostenol-induced farrowing in sows T2 - Journal of Swine Health and Production JF - Journal of Swine Health and Production J2 - JSHAP SN - 1537-209X DP - American Association of Swine Veterinarians PB - American Association of Swine Veterinarians DA - 1998/Mar// PY - 1998 VL - 6 M1 - 2 IS - 2 M2 - 57 SP - 57-59 L2 - https://www.aasv.org/shap/issues/v6n2/v6n2p57.html UR - https://www.aasv.org/shap/abstracts/abstract.php?v6n2p57 L1 - https://www.aasv.org/shap/issues/v6n2/v6n2p57.pdf KW - swine KW - sows KW - parturition KW - cloprostenol KW - oxytocin N2 - Objective: To determine the effect of a second injection of eithercloprostenol or oxytocin after initial cloprostenol induction on the farrowingresponse of sows.Methods: Two experiments were conducted. In experiment 1, sowsreceived one of two treatments: either a single IM injection of 175 µgcloprostenol at day 113 of gestation (n=49) or an IM injection of 175 µgcloprostenol at day 113 of gestation followed by second IM injection of175 µg cloprostenol 6 hours later (n=54). In experiment 2, sows receivedeither a single (n=59) or a double (n=48) cloprostenol injection, as above,or a third treatment in which an IM injection of 30 IU oxytocin (n=56) replacedthe second cloprostenol injection.Results: After a single cloprostenol injection, 61% of sows farrowedduring the following working day. When a second cloprostenol or oxytocininjection was administered 6 hours later, 86% of sows farrowed during thenext working day.Implications: A regime of cloprostenol administered twice or cloprostenolplus oxytocin markedly improved the predictability of induced parturition.This level of predictability should encourage more producers to employ inductiontechnology. ER -