| 摘要 |
An intrauterine device is described useful as an anti-contraceptive destined to apply in dogs wherein it is composed of a body and four diverging branches, two of which emerge in the lower end of the body and the other two in the superior end of the body with an approximate V shape and said superior end branches having a longitude of 4-5 times superior that the body and each branch finishing off with the superior end in half wedge the device furthermore having a copper filament rolled in the body and in each branch of the superior end and furthermore having a loop in the lower end of the body for the nylon thread.
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