View clinical trials related to Oligospermia.
Filter by:The investigators are testing the hypothesis that two ounces of whole-shelled walnuts/day added to the diet of men seeking care for infertility will beneficially affect sperm parameters and fertility. The investigators will compare the walnut intervention to the commonly suggested recommendation of adding an OTC multivitamin supplement to the diet.
Many clinical evidences suggest that Myo-inositol plays a crucial role in human reproduction. Also, it was shown that Myo-inositol concentration in the seminiferous tubules was higher than in serum, and interestingly it was increasing through the epididymis and the deferent duct mining that sperm cell before ejaculation are stored in a "medium" highly enriched in myo-inositol. Starting from this evidences, the investigators hypothesized that myo-inositol may be a possible factor able to improve the semen parameters of samples used in in vitro fertilization cycles.
Insulin resistance in men can be the underlying major factor in reproductive abnormalities ( chronic hypospermatogenesis ) as well as metabolic abnormalities similar to polycystic ovarian syndrome ( PCOS ) in women.
This study was conceived in order to explain what the investigators previously observed suggesting that lisinopril, a drug normally used to treat patients with high blood pressure and heart failure, may be effective in treating infertile men with low sperm count. The investigators hypothesized, therefore, that the drug will not only improve sperm quantity and quality but also increase the fertility in such patients. The investigators first of all reviewed the results of previously published investigations and found out that there was only a few previous studies done in humans.with this class of drugs. Besides, the methods used in conducting most of those studies have been so faulted that the results cannot be trusted to be showing the true picture. The investigators looked at the various faults pointed out with respect to the their design and conduct and took care of them while designing the investigators own study. This was an attempt to provide more credible answers to the question of whether lisinopril, and possibly other drugs of similar mode of action, can be useful in rectifying the problem of infertility caused by low sperm count and , if so, whether it will be safe to use it in people who do not have high blood pressure or heart failure. In order to achieve this the investigators studied 33 patients with sperm of low cell concentration, low percentage of motile cells and high percentage of abnormal cells from no known cause. The patients were randomly allocated to receive either lisinopril 2.5mg daily (17 patients) or daily placebo (16 patients)and their sperm characteristics were examined at intervals, starting from the beginning of the study until when it ended 282 weeks later. The patients were also monitored for adverse events throughout the period. The data form all the patients that took part in the random allocation of treatments at the beginning of the study were included in the analysis that followed, irrespective of whether they completed the study or not.
This study will analyse the sperm global methylation status of 62 infertile men before assisted reproductive techniques. Some of these patients (20%) present hypomethylation of H19 locus. A global methylation analysis may reveal others imprinting defects.
The proposed study is designed to test the following hypotheses: 1. Mouse autosomal or X-linked genes which are exclusively expressed in mouse spermatogonia are also spermatogonia-specific in human. 2. Severe spermatogenic defect, especially hypospermatogenesis or SCOS, is caused by an intrinsic defect in germ line stem cell or speramtogenia. 3. Spermatogonia-specific genes are caudate genes for human spermatogenic defect, especially for hypospermatogenesis or SCOS. 4. For a significant fraction of cases with severe spermatogenic defect, the sterile genes are transmitted via multifactorial inheritance mode. 5. For some cases with severe spermatogenic defect, mutations of spermatogonia- specific genes may be transmitted in the X-linked recessive, autosomal recessive, or autosomal dominant mode.
Varicose veins in the scrotum (varicocele) are responsible for >20% of male infertility in the US. Varicocele are associated with decreased sperm number and markedly reduced sperm fertilizing ability. Surgical repair or removal of varicocele restores fertility in only 1/3 of cases. The goal of this study is to identify markers that predict the outcome of variocele correction. This would offer considerable health cost savings. Based on preliminary findings, we will obtain testis biopsies and semen specimens from infertile men with varicocele and prospectively examining the levels of cadmium, a toxic metal, and expression of genes required for normal sperm function. The semen and biopsies will be obtained during clinically dictated procedures. Cadmium and gene expression will be compared with response to varicocele repair (i.e., increased sperm production; pregnancy).