Lippes loopn.

1962 J. Lippes in C. Tietze Intra-Uterine Contraceptive Devices 71 I wanted a device such that the muscular contractions of the uterus would not press on the entire piece of plastic but on one section at a time only... With this in mind, I designed a device which I call a ‘loop’.]

1964 Lancet 31 Oct. 958/1 The five types available are: the Margulies spiral, the Lippes loop, the Birnberg bow, the Hall-Stone stainless steel ring, and the Zipper nylon ring.

1966 E. Mears in M. Pollock Family Planning iv. 50 With..the Lippes loop the inserter is loaded, introduced..beyond the internal os, rotated..and the device expelled by pushing the plunger.

1967 Time 7 Apr. 73 From Dr. Jack Lippes' labs in Buffalo came a series of double-S designs, now known as the Lippes loop, which has probably the widest acceptance both in the U.S. (150,000 users) and overseas (up to 4,000,000).

1971 H. J. Davis Intrauterine Devices for Contraception vi. 95 The shield..conforms most closely to the average uterine cavity size. The Lippes loop is the next most anatomically correct, commercially available device.