background: the aim of the study was to assess the effect of four repeated ejaculations on the same day at two-hour intervals on conventional and functional semen parameters. methods: three healthy men (32±3.6 years) donated the first semen samples after 3-4 days of sexual abstinence followed by three subsequent samples on the same day at two-hour interval each. semen samples were processed and...

OBJECTIVE In this retrospective study we attempted to report our own data on the different clinical parameters in association with the presence and severity of varicocele in a large group of Austrian men. METHODS The records of 1,111 consecutive patients with clinical varicocele from 1993 to 2010 were evaluated. The presence, grade, and side of any varicocele were recorded. Semen samples, ser...

Chronic bacterial prostatitis (CBP) is caused by bacterial infection and maintains a condition of lower urinary tract infection. It may be a cause of male infertility. However, studies showed inconsistent results regarding the effect of CBP on several parameters of semen. Hence, we conducted a meta-analysis to examine the effect of CBP on basic semen parameters. A systematic review was conducte...

Unexplained infertility requires that more sensitive and mechanism-based biomarkers should be developed and used independently of or in addition to conventional semen parameters for an infertility diagnosis. In the present study, semen samples were collected from young men participating in the Male Reproductive Health in Chongqing College students (MARCHS) cohort study in the follow-up stage in...

BACKGROUND Long-chain polyunsaturated fatty acids (PUFAs) of the omega-3 family are important for sperm membrane integrity, sperm motility and viability. There are evidences to suggest that dietary supplementation with omega-3 fatty acids affects reproduction in men and males of different animal species. Therefore, the aim of current study was to investigate changes in the quality parameters of...

BACKGROUND Ubiquitin, a house-keeping protein that marks other proteins for proteasomal degradation, tags defective sperm during epididymal passage. To establish ubiquitin as a biomarker of human infertility, the present study examines the relationships between sperm ubiquitin content and clinical semen parameters among men from an infertility clinic population with varied aetiologies. METHOD...

Variation in the ejaculatory abstinence period suggested by different guidance bodies have resulted in a growing concern among researchers and clinicians over what the precise period of ejaculatory abstinence ought to be for an optimal semen sample. Several studies have thus been undertaken to examine the association between the length of sexual abstinence and semen characteristics. Not all stu...

BACKGROUND Pregnancy rates with cooled equine semen can be unsatisfactory and show great variation. Information about first cycle pregnancy rates and pregnancy rates per cycle are often lacking from publicly available records. This retrospective cohort study was performed to evaluate the fertility of the Norwegian Coldblooded trotter. The aim of the study was to compare the breeding results aft...

There are currently no WHO guidelines on the indications for semen culture; however, semen cultures are performed in the evaluation of male infertility and the assisted reproductive technology (ART) process. The relevance and significance of positive semen cultures is widely debated in the literature, with no current consensus on the usefulness of this test in relation to male infertility. We r...

The assessment of spermatozoa motility is one of the most often used parameters for semen evaluation. The study was conducted at Poultry Research Station, Madhavaram Milk Colony, Chennai600 051, to  nd the effect of different semen diluents and dilution ratio on per cent spermatozoa motility of pooled guinea fowl semen at 5o C under short term storage(0, 3 and 6 Hours). Irrespective of the sto...