نتایج جستجو برای: tese
تعداد نتایج: 1217 فیلتر نتایج به سال:
Background The most common chromosomal abnormality due to non-obstructive azoospermia (NOA) is Klinefelter syndrome (KS) which occurs in 1-1.72 out of 500-1000 male infants. The probability of retrieving sperm as the outcome could be asymmetrically different between patients with and without KS, therefore logistic regression analysis is not a well-qualified test for this type of data. This stud...
background: about 10% to 15% of infertile men have azoospermia, which could be obstructive or non-obstructive. diagnostic biopsy from the testis and recently testicular sperm extraction (tese) are the most precise investigations in these patients. testicular biopsy can be done unilaterally or bilaterally. the worth of unilateral or bilateral testicular biopsy in men with azoospermia is controve...
BACKGROUND Sperm motility is the reliable parameter that roles in success of intracytoplasmic sperm injection (ICSI), especially in azoospermia. Selection of appropriate culture duration, temperature and media for enhancing the sperm motility is an important issue in assisted reproduction program. The aim was to evaluate the sperm motion characteristics after culturing of testicular sperm extra...
Approximately 15% of couples cannot conceive a child after 1 year of regular, unprotected intercourse. Male factor infertility is contributory in another 30% to 40%. Most causes of male infertility are treatable and the goal of many treatments is to restore the ability to conceive naturally. The dramatic recent improvements in the management of male infertility are largely contributable to impr...
Background: In the past decade, childlessness has become a most important problem in the world. At the same time evidence confirms a link between sexually transmitted diseases (STDs) and infertility problem. Some of viral STDs are: HIV, HPV, HSVand so on. The innate immune system is essential for the initial detection of invading viruses and subsequent activation of adaptive immunity. also, The...
Men with congenital absence or bilateral partial aplasia of vas deferens, or those with failed or surgically unreconstructable obstructions or azospermic men with testicular failure or genetic cause can now be treated by using sperm retrieval techniques in conjunction with in vitro fertilization/intra cytoplasmic sperm injection (ICSI/ IVF). These techniques are: Microsurgical epididymal sperm ...
A meta-cleavage enzyme gene, tesB, was cloned from Comamonas testosteroni TA441. The tesB-disrupted mutant did not grow on testosterone, suggesting that tesB is necessary for TA441 growth on testosterone. The usual substrate of TesB is probably 3,4-dihydroxy-9,10-secoandrosta-1,3,5(10)-triene-9,17-dione. By analyzing the transposon mutants of TA441 that show limited growth on testosterone, tesD...
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