Introduction: Infertility may be defined as inability to conceive within one year of unprotected
regular coitus. Approximately 85–90% of healthy young couples conceive within 1 year …

BACKGROUND: Male infertility is solely responsible for approximately 20% of all infertility in
couples. Various factors have been proposed as having a negative effect on sperm quality; …

Medico-biological and socio-hygienic factors were studied in 300 men who sought medical
help for problems with conception and the manifestation of pathological changes in the …

PIP: Testicular aging starts form age 30 with progressive deterioration of vascularization, the
density of capillaries, the diminution of the efficacy of the blood-testis barrier, the aging of …

Aim To investigate the quality of sperm, total antioxidant activity, concentrations of α-
tocopherol and lipid peroxidation in men of reproductive age living in Ulan-Ude, Irkutsk, and …

Male infertility is one of the key problems of urology. In Russia, as throughout the world, the
violation of the reproductive function of men who are infertile marriage has acquired a …

Immunochemical assay for protein composition was made in 22 fertile and 110 subfertile
human sperm samples. Changes in the levels of albumin, prostatic acid phosphatase, sperm …

Background This is the first large‐scale Russian study describing semen quality and
reproductive hormone levels among young men. Objectives The aim of the study was to …

The influence of frequent ejaculation on sperm quality in 96 men with oligozoospermia,
asthenozoospermia or oligoastenozoospermia was investigated. Ejaculates were produced …