The aim of this study was to evaluate the association between semen quality and the secondary sex ratio (SSR), defined as the ratio of male to female live births. Our study cohort comprised 227 male partners who were enrolled prior to conception in Michigan and Texas between 2005 and 2009, and prospectively followed through delivery of a singleton birth. The male partners provided a baseline an...

OBJECTIVE To quantify the effect of the new 2010 World Health Organization (WHO) semen analysis reference values on reclassifying previous semen analysis parameters and definition of patients with male factor infertility. DESIGN A multi-institutional retrospective chart review. SETTING University and private male infertility clinics. PATIENT(S) Men referred for infertility evaluation. I...

BACKGROUND High rates of sub-fertility and adverse pregnancy outcomes were seen after age 40. In contrast to oogenesis, spermatogenesis continues in elderly men. OBJECTIVE To retrospectively study the impact of aging on semen parameters in male partners of infertile couples in the rural area of developing country over 10 years and to find out whether aging affects male factor fertility and va...

The aim of this research was to evaluate the quality and quantity of semen production of pheasants during the reproductive season. Fifty-five male pheasants (Phasianus colchicus mongolicus) were used from 37-59 weeks of age. Semen samples were collected manually on a biweekly basis. At 45 weeks of age, pheasants which had never produced (n = 22) or only produced occasionally (n = 7) were discar...

This study was conducted to assess the post thaw quality of Kundhi buffalo semen diluted in tris based diluents. After collection the ejaculates were pooled and checked for color, volume, pH, mass activity, progressive linear motility% (PLM), and intactness of cell membrane. The semen qualifying these tests was divided into four aliquots A, B, C and D, diluted with tris based diluents; the last...

Background: Declines in semen quality over time are not well understood. It is suspected that infectious disease may affect reproductive function. The aim of this study was to investigate semen quality in men in infertile relationships who were under investigation for couple infertility and attended a clinic for routine semen analysis over a period of 15years. Materials and Methods: We investig...

Objectives: The present study was conducted to evaluate the relationship between testicular volume measured by using Ultrasonography and seminogram to determine the testicular function in male infertility in Mysore, Karnataka, India. Materials and methods: A total of 274 infertile and 130 normozoospermic males were recruited for this study from Mysore, India. The testicular volumes of all subje...

BACKGROUND Male are involved in near 50% of cases of infertility and reactive oxygen species (ROS) playing an important role in decreasing fertility potential. Accurate measurement of ROS seems to be important in evaluation of infertile male patients. OBJECTIVE To compare ROS measurement in neat and washed semen samples of infertile men and define the best method for evaluation of ROS in thes...

Animal studies and human intervention trials have demonstrated the cancer chemopreventive properties of plant phytoestrogens, and phytoestrogen supplements are now widely available 'over-the-counter'. However, consumption of phytoestrogen-rich diets can cause impaired fertility and reproductive tract disorders in some animals and the apparent decline in human sperm quality over recent decades m...

OBJECTIVE Tobacco smoking is now increasing rapidly throughout the developing world and is one of the biggest threats to current and future world health. Several studies have addressed the role of cigarette smoking on semen quality, but the exact mechanisms remain inconclusive. In order to evaluate the detrimental effects of smoking on semen quality among Saudi subjects, the levels of different...