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Anti-fertility device

  • US 3,911,911 A
  • Filed: 03/27/1974
  • Issued: 10/14/1975
  • Est. Priority Date: 06/16/1969
  • Status: Expired due to Term
First Claim
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1. A means for fertility control in a woman without suppressing ovulation comprising an intrauterinE device comprising at least one hollow capsule containing a progestin within a partially permeable wall which permits release of said progestin therethrough at a rate not higher than about 900 micrograms per day, said device being made of at least one structural member coupled with said capsule and having a length many times greater than its cross-sectional width and thickness, said device having a stable external configuration prior to insertion into the uterus wherein both the width dimension and the longitudinal dimension of the device are greater than the cross-sectional thickness of any of said structural members and of a size great enough to be retained in the human uterine cavity, said device including means for permitting resilient change from said stable configuration to an unstable configuration of reduced width for insertion into the human uterine cavity.

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