Clinical Research Directory

Effect of Daily Intake of Gazpacho on Semen Quality and Oxidative Stress

The goal of this clinical trial is to learn whether drinking a daily serving of gazpacho can improve semen quality in men with reduced sperm quality. The study will also examine how this dietary intervention affects oxidative stress and whether it is well tolerated. The main questions this study aims to answer are: * Does daily consumption of gazpacho improve semen quality in men with altered semen parameters? * Does this dietary intervention affect levels of oxidative stress in semen? * Is daily gazpacho intake feasible and well tolerated as part of a Mediterranean diet? Researchers will compare a Mediterranean diet plus daily gazpacho intake with a Mediterranean diet alone to determine whether adding gazpacho provides additional benefits for male reproductive health. Participants will: * Follow a standardized Mediterranean diet for 12 weeks * Drink 330 mL of gazpacho every day or follow the diet without gazpacho * Provide semen samples at the start of the study and after 12 weeks * Complete a short diary to record adherence to the dietary intervention * Be followed for up to 18 months to record reproductive outcomes

Efficacy and Safety of a New Sperm Capacitation Method

Prospective, multicenter research study with a split-sample design on semen samples, without intervention, to evaluate the efficacy and safety of HyperSperm, a new sperm capacitation method, in 300 semen samples with various characteristics and abnormalities, in an in vitro study over 12 months.

Probiotics on Sperm Quality in Male Infertility Patients

This randomized, placebo-controlled pilot study aims to evaluate the effects of probiotic supplementation on sperm quality in male patients diagnosed with infertility. Male infertility accounts for approximately 40% of all infertility cases and is closely related to abnormalities in sperm count, motility, and morphology. Factors such as oxidative stress, inflammation, and DNA fragmentation are known to impact sperm function and subsequent fertilization potential negatively. Probiotics are microorganisms that confer health benefits by improving the intestinal microenvironment and regulating immunity. Emerging research suggests that probiotics may reduce oxidative stress and DNA fragmentation in men with asthenozoospermia; however, clinical data on human sperm remains limited. This study seeks to determine whether specific probiotic strains can improve sperm parameters and function in patients with unexplained oligozoospermia, asthenozoospermia, or oligoasthenoteratozoospermia. The study will enroll 60 male participants aged 20 to 45 who meet specific inclusion criteria, including a sperm concentration of less than 50 million/mL, motility less than 40%, and normal morphology (Kruger) less than 4%. Participants will be randomly assigned to either an experimental group receiving probiotics or a control group receiving a placebo for approximately 100 days. Semen samples will be collected and analyzed at three time points: before the intervention (Day 0), during the intervention (Day 60), and at the end of the study (Day 100). The primary objective is to assess changes in sperm concentration, motility, and morphology using the Computer-Aided Sperm Analysis (CASA) system. Secondary objectives include evaluating sperm DNA integrity using the Sperm Chromatin Structure Assay (SCSA) by flow cytometry and assessing sperm function via the acrosome reaction assay. The results of this pilot study will help determine the potential therapeutic role of probiotics in the management of male infertility.

Medical Treatment Alone Versus Varicocelectomy Versus Varicocelectomy and Medical Treatment

A varicocele is defined as an abnormal venous dilatation and/or tortuosity of the pampiniform plexus in the scrotum. Although varicoceles are almost always and more common on the left side, up to 50% of the men with varicocele, have bilateral varicoceles. Varicocele has a negative impact on spermatogenesis, testicular volume, Standard semen parameters, and fertilization, implantation, and embryo outcomes.

The Association of Gut Microbiota and Spermatogenic Dysfunction

This is a multicenter, case-control study that aims to investigate the relationship between microbiota and sperm quality via stool, blood, and urine microbiome, metabolomics, and collected clinical metadata. The results of the spermatogenic dysfunction, including aspermia, oligozoospermia, asthenozoospermia, and teratozoospermia, will be compared to normal basic semen analysis utilizing the World Health Organization (WHO) semen analysis procedure 5th edition.