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IntraUterinBall, IUB, Copper bead ball with guide tube, Hormone-free contraception with shape memory, Dynamic contraceptive system Stock Photo - Alamy
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Double s-shaped IUD, some parts of the loop covered with pieces of copper, white plastic string attached. | Dittrick Medical History Center
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Copper pearls ball (IUB Ballerine) Munich | hormone-free contraception - Munich Gynecology Dr. Möller
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IUB Ballerine: an ergonomic approach to non-hormonal contraception - Medical Technology | Issue 40 | June 2021
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