[Clinical guidelines «Polycystic Ovary Syndrome¼].

Polycystic ovary syndrome (PCOS) is a polygenic endocrine disorder caused by both genetic and epigenetic factors. Depending on the period of a woman's life, the clinical picture, diagnosis, and treatment tactics of the disease are different. PCOS has a complex of reproductive, metabolic and psychological characteristics. The target audience of these clinical recommendations are obstetrician-gynecologists, endocrinologists, general practitioners, general practitioners. In these clinical guidelines, all information is ranked according to the level of persuasiveness of recommendations and the reliability of evidence, depending on the number and quality of studies on this issue.

Solutions for vectorial beam coupling under ac field in cubic photorefractive crystals.

We develop a theory of vectorial wave coupling in cubic photorefractive crystals placed in an alternating ac field to enhance the nonlinear response. It is proven in the general case that despite essential differences between the diffusion and the ac nonlocal responses, the latter keeps the light interference fringes straight during the interaction. This fundamental feature allows, under certain restrictions, to reduce the nonlinear problem of vectorial coupling to the known linear problem of vectorial Bragg diffraction from a spatially uniform grating, which admits an exact solution. As a result, the nonlinear vectorial problem can be effectively solved for a number of practically important cases. These cases include nontrivial polarization effects and also the high-contrast effects. The presence of conservation laws involving the polarization degrees of freedom is shown. A number of particular cases relevant to experiments with BTO crystals are considered.

[The causes of male sterility in Siberia]. / Prichiny muzhskogo besplodiia v Sibiri.

The investigation was covered by the WHO program "Human Reproduction". The epidemiological survey in Tomsk has established 16.7% infertility rate. Prevalence and pattern of male infertility in families were studied. Disorders of sperm fertilizing capacity were observed in 45% of males from infertile couples. The main cause of male fertility defects was varicocele (11.3%). The percentage of idiopathic pathospermia remains high (20.9%). Inflammatory diseases of sex glands in males are not the leading cause of male infertility.