Shield Device


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Experimental design. Modified heart or shield with magnet in the central spoke. Cervical threads (absent here) would be attached through the lower eyelet at the cervical end of the central spoke. This device was tested on 12 women at the Johns Hopkins Hospital Contraceptive Clinic. See: Israel, Robert and Hugh J. Davis. "Effect of Intrauterine Contraceptive Devices on the Endometrium". JAMA, Feb 28, 1966, v195, no9, p.144-148.