Uterine Motility in Sows During Spontaneous Parturition and Induced Parturitions with the PGF Analog Alfbprostol and Oxytocin |
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| Authors: | G Maffeo D Vigo R Ballabio O Olivia F Cairoli W Jöchle |
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| Institution: | Institute for Veterinary Physiology and Biochemistry;University of Milan, Italy;;Institute and Clinic for Veterinary Obstetrics and Gynecology, University of Milan, Italy;;Denville, NJ, 07834, USA |
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| Abstract: | Contents: Uterine activity, i.e. myometrial contractions, were recorded in 11 sows prior to and during parturition by using strain gauges placed onto uterine horns about 15 to 20 cm cranial of the bifurcation. Tocographic patterns observed prior to and during spontaneous and alfaprostol induced parturitions were normal. Administration of 20, 10 or 5 I.U. oxytocin 22 hours after alfaprostol quickly initiated abnormal periparturient contraction patterns with 20 and 10 I.U. oxytocin and in one of two animals receiving 5 I. U. These were characterized initially by prolonged tetanic contractions resulting in delayed deliveries, and later by the premature occurrence of patterns seen normally only during the phase of placental expulsions, although not all piglets had been delivered. The importance to use myornetrial activity profiles to evaluate parturition induction methods was stressed . |
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| Keywords: | Induced parturition — Sow — myometrial activities — PGF analog — oxytocin |
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