| 摘要 |
A female is temporarily sterilized by blocking the entrance to the uterus at the oviduct exit by means of a plug comprising (a) a blocking plate, which blocks the uterus entrance, (b) a plug positioning plate, which is passed through the wall of the uterus and (C) a stem which joins the blocking and positioning plates. For emplacing the plug, the shaft which carries the plug to its blocking position has a cutting blade at its forward end which cuts an opening through the wall of the uterus through which the positioning plate of the plug is then passed. The plug is then ejected from the support rod, which is thereafter withdrawn. Dye may be pumped into the uterus to facilitate observation of the process.
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