OBJECTIVES Considerable interest and controversy over a possible decline in semen quality during the 20th century raised concern that semen quality could have reached a critically low level where it might affect human reproduction. The authors therefore initiated a study to assess reproductive health in men from the general population and to monitor changes in semen quality over time. DESIGN ...

OBJECTIVE To compare the semen quality and age-specific changes in men between the 1980s and 2000s. DESIGN Prospective study. SETTING Andrology laboratory, University of Calcutta, India. PATIENT(S) A semen sample was obtained from 3729 men presenting for infertility problems in two distinct decades, that is, between 1981-85 and 2000-2006. INTERVENTION(S) Subjects with sperm count >20 x ...

The aim of this study was to evaluate the semen quality of university students in Wuhan, the largest city in the world in terms of the number of university students. All student sperm donors recorded in the Hubei Province Human Sperm Bank from 1 March 2010 to 31 December 2013 were screened. At last, a total of 3616 semen samples from 1808 university student sperm donors were eligible and retros...

A study was conducted to evaluate the effects of dietary lipid sources on the reproductive performances of Hy-line Silver-Brown cockerels. Five different lipid sources namely fish oil, sunflower oil, high oleic acid sunflower oil, tallow and an equal (50:50) proportion of linseed and fish oil (representing the control diet), were used in formulating five isoenergetic and isonitrogenous diets (3...

PURPOSE To date, standard semen parameters have been the only parameters investigated in sperm samples of infertile men in Algeria. We investigated, for the first time, semen parameters according to sperm DNA fragmentation (SDF) in these subjects. MATERIALS AND METHODS SDF was determined by a validated sperm chromatin dispersion test in 26 infertile men. Patients were split into two groups ac...

the objective of this study was to evaluate effect of different concentrations of catalase in two extenders on motility, viability and lipid peroxidation bull spermatozoa during semen freezing process. thirty ejaculates collected from ten holstein bulls were pooled and evaluated at 37 °c. pool ejaculated was split into two main experimental groups, 1 and 2. in experiment 1, specimen was diluted...

BACKGROUND We seek to determine whether dietary and supplement intake of specific micronutrients (zinc and folate) and antioxidants (vitamins C, E and beta-carotene) is associated with semen quality. METHODS Ninety-seven healthy, non-smoking men provided semen and were interviewed. Average daily nutrient intake from food and supplements was derived from a self-administered food frequency ques...

Objective: To determine if head and shoulder relaxation massage given immediately before collecting a semen sample will result in an increased total motile sperm count or improved semen parameters for intrauterine insemination (IUI). Design: Prospective randomized study Setting: Academic fertility center Patients: Forty men undergoing clomiphene IUI therapy with their partners Interventions: Ma...

Background: Approximately, one third of world's population older than 15 years of age smokes. Cigarette smoke contains toxic chemical, mutagenic and carcinogenic compounds. Some of these substances were found in seminal plasma.Over the past two decades, there has been an increasing body of evidence that cigarette smoking may impair human semen quality.The results of these studies are confl...

background: sperm dna fragmentation is known as an important cause of male infertility. the influence of sperm dna damage on reproductive potential has been subject of many studies indicating various results and remaining the subject controversial. in this study, we investigated differences of the semen parameters and intracytoplasmic sperm injection (icsi) outcome according to sperm dna fragme...