Sperms, collected following sexual activity of volunteers, were processed to isolate high-molecular weight deoxyribonucleic acid (DNA). These DNA samples were digested with particular restriction endonucleases and analyzed with probes that recognize polymorphic DNA regions within the human genome. The pattern of restriction fragment length polymorphisms (RFLP) detected by this test is identical to that observed with DNA prepared from blood of the male sexual partner. Therefore, RFLP analysis can be used to exclude or to determine the probable identity of an assailant in rape cases.
This article describes the first use of ultrasound in locating in vivo NORPLANT subdermal contraceptive implants. Providing low dose, continuous contraception for women. the NORPLANT system utilizes Silastic tubing filled with levonorgestrel. The progestin-filled tubing is not radiopaque. Anticipating the large scale use of NORPLANT subdermal implants, the potential, but rare problem of difficult localization of an implant is recognized. The feasibility of using ultrasound for the painless and safe localization of NORPLANT rods and capsules is demonstrated.
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