作者: Valery Martynov , Leticia Menchaca , Vikas Gupta , A. Johnson
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摘要: Contraceptive intrauterine devices made of thin film shape memory alloy materials. The are formed in three-dimensional shapes which contact uterus tissue a human or other mammal to prevent conception. In certain embodiments, structural features such as tails, fenestrations, ridges grooves on the enhance contraceptive effect.