Search Results
Results 301 - 350 of 1520
< 2 3 4 5 6 7 8 9 10 11 12 >
Zini Armand - - 2005
BACKGROUND: Sperm DNA damage is prevalent amongst infertile men and has been shown to strongly impact adversely natural reproduction, intrauterine insemination-assisted reproduction and to a lesser degree IVF/ICSI fertilization. The objective of this study was to examine further the relationship between sperm DNA denaturation (DD) and reproductive outcomes after ICSI. ...
Walters A H - - 2006
This study was conducted to follow the chronology of pronuclear formation in bovine zygotes after in vitro insemination with a population of spermatozoa having abnormal morphology. Semen samples were obtained and cryopreserved from four Holstein bulls before and after a scrotal insulation period of 48 h (Day 0). A pre-insult ...
Choi Y H - - 2006
This study was conducted to evaluate the effects of thawing, division into aliquots and refreezing on fertilizing capacity (ability to support embryo development after intracytoplasmic sperm injection; ICSI) of frozen stallion semen. Frozen semen from a fertile stallion was thawed, diluted 1:100 with freezing extender, and refrozen (2F treatment). Control ...
Schiff Jonathan - - 2005
PURPOSE: Vasoepididymostomy remains one of the most technically challenging procedures in all of microsurgery. The technique has evolved from an end-to-end, to an end-to-side technique, then to intussusception end-to-side methods. We recently reported the superiority of 2-suture longitudinal and 3-suture triangulation intussusception techniques in rats. In the present study we ...
Stalf T - - 2005
The vitality of spermatozoa used for intracytoplasmic sperm injection (ICSI) is a crucial factor for fertilization, establishment and outcome of a pregnancy in assisted reproductive technique cycles. The sperm origin may also be a limiting factor, although little is known about this issue. It is known that the motility of ...
Zorn Branko - - 2005
In this study we sought to determine whether intracytoplasmic sperm injection (ICSI) could improve the efficacy of treatment with gonadotrophins in gonadotrophin-deficient men in terms of pregnancy. A series of six adult men (aged 26-47 years) with hypogonadotrophic hypogonadism (HH) is reported: four men with prepubertal isolated idiopathic HH (IIHH) ...
Payne John F - - 2005
OBJECTIVE: To test the hypothesis that couples with sperm chromatin structure assay (SCSA) DNA fragmentation index (DFI) values >27% would not achieve pregnancy with assisted reproductive techniques (ART) and to investigate how DFI and high DNA stainability (HDS), as measured by the SCSA, affect fertilization, cleavage, implantation, and pregnancy rates ...
Tanaka Hiromitsu - - 2005
We cloned a testis-specific cDNA from mice that encodes a histone H1-like, haploid germ cell-specific nuclear protein designated HANP1/H1T2. The HANP1/H1T2 protein was specifically localized to the nuclei of murine spermatids during differentiation steps 5 to 13 but not to the nuclei of mature sperm. HANP1/H1T2 contains an arginine-serine-rich domain ...
Mabeck L M - - 2005
BACKGROUND: New biological markers of male fecundity are needed for use in large-scale epidemiological studies. We studied the association between male inhibin B and fecundability. METHODS: Four hundred and thirty Danish couples without previous reproductive experience were followed from termination of contraception until pregnancy or for a maximum of six ...
Storgaard Lone - - 2006
Male reproductive disorders in humans and prenatal indicators of estrogen exposure. A review of published epidemiological studies. Reports of an increase in male reproductive disorders in several countries led to the hypothesis that estrogens during fetal life may cause reduced sperm counts, cryptorchidism, hypospadias and testicular cancer. So far the ...
Revel Ariel - - 2005
OBJECTIVE: To describe the success rate of intracytoplasmic sperm injection (ICSI) using thawed cryopreserved sperm in male cancer patients. DESIGN: Retrospective consecutive study. SETTING: IVF unit in a tertiary university hospital. PATIENT(S): Twenty-one couples treated by ICSI using the frozen-thawed sperm of husbands treated for cancer. INTERVENTION(S): Follow-up of all ...
Witsenburg Cynthia - - 2005
OBJECTIVE: Follow-up of IVF/intracytoplasmic sperm injection (ICSI) patients to obtain accurate information concerning chances of live birth as well as early treatment dropout. Comparison of the cumulative pregnancy rates, established in cohorts, with those estimated with life table analysis to determine which method provides the most accurate data without overestimation. ...
Waldinger Marcel D - - 2005
INTRODUCTION: Intravaginal ejaculation latency time (IELT), defined as the time between the start of vaginal intromission and the start of intravaginal ejaculation, is increasingly used in clinical trials to assess the amount of selective serotonin reuptake inhibitor-induced ejaculation delay in men with premature ejaculation. Prospectively, stopwatch assessment of IELTs has ...
Huang Chun-Chia - - 2005
OBJECTIVE: To evaluate sperm DNA fragmentation in correlation with sperm parameters and IVF/intracytoplasmic sperm injection (ICSI) outcomes. DESIGN: Retrospective review. SETTING: A tertiary infertility referral clinic. PATIENT(S): We collected 303 semen samples from patients undergoing IVF with or without ICSI. INTERVENTION(S): Terminal deoxynucleotidyl transferase-mediated deoxyuridine triphosphate-biotin nick end labeling (TUNEL) ...
Esfandiari Navid - - 2005
OBJECTIVE: To investigate incidence and causes of complete failed fertilization after intracytoplasmic sperm injection (ICSI) in a tertiary care facility. METHODS: A total of 1,779 cycles between February 1994 and December 2003 were analyzed. Study parameters were female age, infertility diagnosis, ovarian stimulation protocol, estradiol level on day of hCG ...
Tal J - - 2005
BACKGROUND: In patients with transient azoospermia, few sperm may be found in the ejaculate. We investigated the outcome of ICSI in patients with transient azoospermia. METHODS: Records of patients with transient azoospermia referred during a 42 month period were reviewed. If only immotile sperm were found, the sample was incubated ...
Akashi Takuya - - 2005
AIM: To report a birth after intracytoplasmic sperm injection (ICSI) of ejaculated spermatozoa from a man with mosaic Klinefelter's syndrome detected by fluorescence in situ hybridization (FISH) analysis. METHODS: A 35-year-old man with a normal appearance consulted our hospital because of sterility over a 5-year period. Chromosome analysis showed low-incidence ...
Yeoman Richard R - - 2005
The objective was to develop a sperm freezing procedure suitable for use in the propagation of valuable founder animals by assisted reproductive technologies. Here, we report a comparison of processing methods by measuring the motility of fresh and frozen-thawed rhesus monkey spermatozoa and fertility via intracytoplasmic spermatozoa injection (ICSI) of ...
Battaglia Cesare - - 2005
Fifty-seven males, previously treated for malignancies in childhood, and who refused to masturbate for semen analysis, were submitted to hormonal, ultrasonographic, and Doppler evaluation to assess the effects of chemotherapy/radiotherapy on gonadal function. Nineteen normal healthy fertile males served as controls. In the studied population, FSH was inversely correlated with ...
Tournaye H - - 2005
When optimization of the male and female partner has failed, techniques of assisted reproduction may be employed. Their common rationale is to enhance the probability of fertilization by bringing the spermatozoa closer to the oocyte(s). Assisted reproductive techniques are not a curative treatment but they intend to circumvent some functional ...
Kadoch Isaac Jacques - - 2005
The recovery of a mature oocyte from a natural cycle followed by IVF (nIVF) is an attractive alternative to conventional IVF, involving ovarian stimulation, in the treatment of female infertility. Similarly, surgical recovery of spermatozoa from the epididymis by percutaneous sperm aspiration (PESA) has simplified the treatment of men with ...
Jedrzejczak P - - 2005
The present study was carried out to investigate the relationship between sperm subpopulation kinetics on in vitro fertilization rate. The ability of human sperm to achieve fertilization oocytes was investigated in relation to particular motility parameters obtained on a computer aided sperm analysis system base. Analysis covers velocity straight linear ...
Orhan I - - 2005
We reviewed records from patients who underwent two different microsurgical varicocelectomy methods: 147 (high inguinal (MHIV) and 65 sub-inguinal (MSIV) microsurgery) to compare the therapeutic activity and complications. Patients who had 2 different microsurgical varicocelectomies were compared according to preoperative connected vein, number of designated arteries, postoperative semen and improvement ...
Jung A - - 2005
For infertile men with a history of testicular maldescent only few therapeutic options exist beside assisted reproduction. The aim of our study was to evaluate the influence of nocturnal scrotal cooling on semen quality in such patients presenting with oligozoospermia. Twenty infertile men with a history of testicular maldescent and ...
Eibensteiner Lynn - - 2005
This study examined lead exposure (n = 43) and semen quality (n = 18) among traffic police officers in Arequipa, Peru, where leaded gasoline is used. Blood lead (PbB) was measured using atomic absorption spectrophotometry, and semen was analyzed following World Health Organization (WHO) protocol. Mean PbB was 48.5 microg/dL. ...
Rutllant J - - 2005
The tubular genital organs of the mammalian female reproductive tract provide different luminal microenvironments that can act as an aid or a barrier to gamete transport and the first steps of embryonic development. The mechanism of sperm transport through the genital tract has not been fully established but, first of ...
Dafopoulos Konstantinos - - 2005
The aim of the present study was to describe a simplified and inexpensive method of testicular tissue freezing, to assess the cumulative clinical pregnancy rate (CPR) by this technique, and to provide useful information for counselling couples with non-obstructive azoospermia. One hundred and sixty-five couples with non-obstructive azoospermic males pursuing ...
Dafopoulos Konstantinos - - 2005
There is a lack of data regarding variables affecting the treatment outcome for non-obstructive azoospermia when spermatozoa from cryopreserved testicular specimens are utilized for ICSI. The objective of the present retrospective analysis was to investigate the effect of various parameters on treatment outcome in such cases. One hundred and sixty-five ...
Check J H - - 2005
A high DNA fragmentation index (DFI) when performing the sperm chromatin structural (SCSA) assay was claimed to be so specific for male subfertility that even IVF and ICSI did not result in live pregnancies. The present study was designed to corroborate or refute these findings. The SCSA test was performed ...
Pasqualotto Fábio F - - 2005
OBJECTIVE: To assess fertilization, pregnancy, and miscarriage rates after intracytoplasmic sperm injection (ICSI) with epididymal or testicular spermatozoa from different types of azoospermia. DESIGN: Retrospective study. SETTING: Academic medical center and private fertility center. PATIENT(S): Two hundred twelve patients underwent 257 ICSI cycles. INTERVENTION(S): Cycles of ICSI were divided into ...
Hsieh M L - - 2005
Several studies indicate that microsurgical modified one-layer vasovasostomy is comparable to the two-layer anastomosis with respect to patency and pregnancy rates. The objective of this study was to determine the feasibility and result of modified one-layer vasovasostomy under loupe magnification only. Thirty-two patients aged 28 to 64 years (mean 41.3 ...
Amarin Zouhair O - - 2005
OBJECTIVE: This study assessed the value of delayed intracytoplasmic sperm injection after failure of initial in-vitro fertilization in patients with normal seminology. METHODS: A case series analysis was conducted on 82 couples who underwent delayed intracytoplasmic sperm injection after failure of initial in-vitro fertilization at Fakeeh Hospital, Jeddah, Kingdom of ...
Grigoriou Odysseas - - 2005
OBJECTIVE: To evaluate the effect of sperm treatment with exogenous platelet-activating factor (PAF) on IUI clinical pregnancy rate. DESIGN: Prospective randomized study. SETTING: Assisted Reproduction Unit, 2nd Department of Obstetrics and Gynecology, University of Athens, Aretaieion Hospital, Athens, Greece. SUBJECT(S): Fifty-two couples with unexplained infertility, candidates for IUI. INTERVENTION(S): Sperm ...
Aoki Vincent W - - 2005
BACKGROUND: The sperm penetration assay (SPA) is used to predict the fertilizing capacity of sperm. Thus, some programs rely on SPA scores to formulate insemination plans in conjunction with in-vitro fertilization (IVF) cycles. The purpose of this study was to evaluate if a relationship exists between SPA scores and polyspermy ...
Sandlow Jay I - - 2005
PURPOSE: We examined the indications for vasovasostomy (VV) in the convoluted vas deferens as well as the outcome of this procedure. MATERIALS AND METHODS: We retrospectively analyzed the indications and outcomes of all vasectomy reversals performed in the convoluted vas deferens (CVV). Indications for CVV were clear fluid with or ...
Ghanem Mohamed - - 2005
To investigate the outcome of intracytoplasmic sperm injection with fresh and cryopreserved-thawed testicular spermatozoa in the first cycle in patients with obstructive azoospermia (OA) and non-obstructive azoospermia (NOA), a total of 90 cases, 48 OA and 42 NOA were studied. All patients underwent sperm retrieval by testicular sperm extraction (TESE) ...
Mátyás Sz - - 2005
The authors summarize their experience in 75 in vitro fertilization cycles, where frozen-thawed testicular spermatozoa were used for intracytoplasmic sperm injection. In 32 cases, motile spermatozoa could be observed in the frozen-thawed sample. In 34 cases, motility could be induced by pentoxifylline and in nine cases immotile spermatozoa, selected with ...
Hikichi Takafusa - - 2005
Although both intracytoplasmic sperm injection (ICSI) and round spermatid injection (ROSI) are used in infertility treatments, the rate of offspring achieved with ROSI is low compared with that achieved with ICSI. The difficulty in correctly selecting round spermatids from testicular cells is one of the causes of this phenomenon. We ...
Rignell-Hydbom Anna - - 2005
Persistent organochlorine pollutants (POPs) such as polychlorinated biphenyls (PCBs) and dichlorodiphenyldichloroethylene (p,p'-DDE), the major metabolite of dichlorodiphenyltrichloroethane (DDT), are stable lipophilic compounds widely found in the environment and in the general population. They can enter the food chain, and their negative impact on male reproduction is currently under active scrutiny. ...
Johnson Lawrence A - - 2005
It is estimated that as many as 30,000 offspring, mostly cattle, have been produced in the past 5 years using AI or some other means of transport with spermatozoa sexed by flow cytometric sperm sorting and DNA as the marker of differentiation. It is well documented that the only marker ...
Benchaib M - - 2005
BACKGROUND: In cases of male infertility, routine analysis for sperm characteristics is a poor predictive factor for the segmentation rate and embryo development in assisted reproductive technologies. It is assumed that epigenetic factors could have an influence on the embryo's quality. The aim of this work was to determine the ...
Biering-Sørensen F - - 2005
PURPOSE: Present the possibility for treatment of male infertility, spasticity, and neurogenic detrusor overactivity in spinal cord lesioned (SCL) individuals with penile vibratory stimulation (PVS). METHOD: Obtaining reflex-ejaculation by PVS, by using a vibrator developed for this purpose. The stimulation was performed with a vibrating disc of hard plastic placed ...
Lindsey A C - - 2005
Practical application of sex-selected spermatozoa in the horse industry would be greatly improved by the ability to develop simplified methods for shipping, storing, and inseminating sex-selected spermatozoa. Acceptable pregnancy rates have been achieved using fresh sex-sorted stallion sperm, however many stallion owners are reluctant to send their stallions to the ...
Check J H - - 2005
In vitro fertilization-embryo transfer seems to be an effective treatment for unexplained infertility. Some IVF centers always perform intracytoplasmic sperm injection in these circumstances being concerned that fertilization failure may occur by conventional oocyte insemination. However, other IVF centers perform intracytoplasmic sperm injection on half of the oocytes and do ...
Kim Soo Woong - - 2005
The aim of the study was to determine whether the pregnancy rate with the same female partner or younger partners was higher compared with different or older partners after undergoing repeated vasectomy reversal. A total of 44 patients were enrolled in the present study. The cause of reversal in patients ...
Toft Gunnar - - 2005
Persistent organochlorine pollutants (POPs) may interfere with reproductive function but direct evidence in humans is very limited. Fertility was examined in four regions with contrasting blood levels of POPs. Pregnant women and their partners in Warsaw (Poland), Kharkiv (Ukraine) and Greenland were consecutively enrolled during antenatal visits. Swedish fishermen and ...
Gat Yigal - - 2005
BACKGROUND: To evaluate the improvement in semen quality and pregnancy rate after internal spermatic vein (ISV) embolization in men with nonobstructive azoospermia virtual azoospermia, or extremely severe oligoteratoasthenoazoospermia (OTA). METHODS: A prospective cohort of 101 azoospermic or severe oligoteratoasthenospermic men of mean (+/-SD) age 34.1+/-7.7 years who underwent ISV between ...
Katsuki Takafumi - - 2005
BACKGROUND: Sperm concentration and motility are poor predictors of the outcome of intrauterine insemination (IUI), hysteroscopic intratubal insemination (HIT), or complete fertilization failure (CFF) in conventional IVF. We investigated whether the calcium ionophore-induced acrosome reaction (AR) constitutes an additional indicator of CFF and pregnancy that is independent of these semen ...
Peeraer Karen - - 2004
This study presents a case of intracytoplasmic sperm injection (ICSI) with ejaculated immotile spermatozoa from a patient with immotile cilia syndrome. Semen analysis of the patient suffering from immotile cilia syndrome revealed an extreme oligoasthenoteratozoospermia (OAT: count <1.4 x 10(6)/ml, 0% motility and 3% normal morphology). Electron microscopy of sperm ...
Nasr-Esfahani M H - - 2004
During spermiogenesis, histones are replaced by protamines (P1 and P2), resulting in sperm chromatin condensation followed by a halt to gene expression in haploid spermatids and spermatozoa. As a consequence, protamine deficiency and aberrant P1/P2 ratio have a profound effect on both fertilization and embryo development. However, reports on the ...
< 2 3 4 5 6 7 8 9 10 11 12 >