Fertilization in forensic against

The need to establish the ability of male fertility may occur when investigating various sexual crimes and the resolution of some civil cases, such as when the disputed paternity, divorce and other Fertilization is possible if there are in semen normally formed motile sperm and free passage through semyavynosyaschih way. The inability to O. may be due to bilateral degenerative changes spermatogenic epithelium of convoluted tubules of the testes (see) and atrophy in the result of inflammatory processes (e.g., tuberculosis), mechanical injuries, radiation (x-rays, radioactive substances and other), the absence or underdevelopment of the testicles (cryptorchidism), diseases of the urethra (mostly chronic gonorrhea). In some cases there is temporary failure of fertilization, is caused by the exhaustion, acute or chronic disease, exogenous intoxication, etc. that can be installed with the study of various medical documents and the testimony of the doctors who treated the patient.
In the absence of obvious signs of inability to About. we need a research specialist (urologist) fresh sperm. Research methodology: a drop of sperm is placed on a slightly warmed glass slide, cover cover glass and examined under a microscope with increase of not less than 400-500 times. The presence in view of morphologically normal motile sperm demonstrates the ability to fertilize. The inability to O. confirm azoospermia (no sperm) and Aspirmatic (no sperm). The detection of a single malformed motile sperm is considered as a sharp decline in the ability to fertilize. If necrosphere and in complex, uncertain cases reseeding research sperm, as well as a thorough clinical examination men (and sometimes a biopsy of the testicle). During the examination should consider the possibility of deliberate substitution of sperm, as well as the impact of various factors (high temperature, chemicals)that changed the properties of sperm, for example caused the stillness of sperm. Cm. also Impotence (forensic).