Search Results
Results 451 - 500 of 1520
< 5 6 7 8 9 10 11 12 13 14 15 >
Morshedi Mahmood - - 2003
OBJECTIVE: To examine pregnancy outcome with two methods of semen preparation for intrauterine insemination (IUI). DESIGN: Prospective and randomized study. SETTINGS: Academic tertiary center. PATIENT(S): Three hundred eleven couples undergoing 676 consecutive cycles of assisted conception using IUI. INTERVENTION(S): Semen samples collected for IUI were randomized to wash only or ...
Westlander G - - 2003
We report two cases of infertility treatment in couples where males suffered from Kartagener's syndrome (KS) and a total absence of motile sperm in the ejaculate. A total of three ICSI cycles was carried out. In all cycles, viable ejaculated or testicular spermatozoa were selected using the hypo-osmotic swelling (HOS) ...
Dirnfeld L - - 2003
To compare the outcome of sperm extraction 24 h before ovum pickup and on the day of oocyte retrieval. A controlled study was performed to compare the outcome of 90 sperm extractions and in vitro sperm injection cycles performed in 54 patients. Available fresh sperm for the sperm injection procedure ...
Carrell Douglas T - - 2003
OBJECTIVE: To evaluate sperm chromosome aneuploidy and semen quality in 24 partners of women with unexplained recurrent pregnancy loss and to analyze the data in relation to sperm apoptosis data. METHODS: Semen quality parameters and sperm chromosome aneuploidy for chromosomes X, Y, 13, 18, and 21 were evaluated in the ...
Loft Steffen - - 2003
BACKGROUND: Oxidative stress and related DNA damage in human sperm may be important for fecundity and pregnancy outcome. METHODS: We studied the level of oxidative DNA damage in terms of 7-hydro-8-oxo-2'-deoxyguanosine (8-oxodG) in sperm DNA among 225 first-pregnancy planners. Over the six menstrual cycle follow-up time, after cessation of contraception, ...
Ben Rhouma Khémais - - 2003
OBJECTIVE: To compare the outcomes of intracytoplasmic sperm injection (ICSI) with fresh and cryopreserved testicular spermatozoa in patients with obstructive and nonobstructive azoospermia. STUDY DESIGN: Retrospective analysis. RESULTS: A total of 60 ICSI treatment cycles (32 fresh, 28 frozen) using testicular sperm obtained by open biopsy were analyzed retrospectively. No ...
Check Matthew - - 2003
To corroborate or refute a previous study demonstrating that in vitro fertilization (IVF) with intracytoplasmic sperm injection (ICSI) is an effective therapy for infertility related to males with subnormal hypoosmotic swelling tests (HOST). The study would also determine if the copresence of poor morphology has any adverse effect on outcome. ...
Dacheux Jean-Louis - - 2003
The final stages of sperm differentiation occur outside the gonad and are not under the genomic control of germ cells. Only sequential interactions with the medium surrounding the sperm are believed to induce the final steps of spermatogenesis. The epididymis, a long tubule with very active secretory and reabsorption functions, ...
Nalesnik Jeffrey G - - 2003
PURPOSE: To determine the long-term patency and pregnancy rates after vasovasostomy and to determine the likelihood of having more than 1 child after this procedure. MATERIALS AND METHODS: We performed a retrospective examination of 73 patients that were at least 4 years out from vasovasostomy at our institution. Patients and ...
Pasqualotto Fabio F - - 2003
PURPOSE: The development of intracytoplasmic sperm injection spawned new methods of sperm retrieval for men with obstructive azoospermia who did not want to undergo reconstruction of the seminal tract. There is a wide array of different procedures that may be performed in these cases, for instance percutaneous epididymal sperm aspiration ...
Nazerali Hanif - - 2003
The main purpose of this retrospective, cross-sectional study was to evaluate the effectiveness of vasectomy in an ongoing public sector program in Nepal. We evaluated semen samples from men who had previously had a vasectomy, and asked about the occurrence of pregnancies in the men's partners. In addition, the surgeons ...
Hovatta Outi - - 2003
Cryopreservation of ovarian and testicular tissue can be used in young individuals who are likely to lose their gonadal function prematurely because of chemotherapy, radiotherapy or a known genetic condition causing gonadal failure. Tissue cryopreservation is relatively well established, but freezing techniques have still to be optimized. Slow programmed freezing ...
Shieh Jeng-Yi - - 2003
OBJECTIVE: To help anejaculatory men with spinal cord injury (SCI) to procreate. DESIGN: Prospective, clinical study. SETTING: A team of physiatrists, urologists, and gynecologists at a university hospital in Taiwan. PARTICIPANTS: Ten infertile men with SCI seen at our hospital between 1995 and 2001. INTERVENTIONS: Electroejaculation induced their seminal emission. ...
Zukerman Zvi - - 2003
To determine if spermatozoa are present in the preejaculatory penile secretion, originating from Cowper's gland. Prospective clinical and laboratory study. Andrology and Sex Counseling Unit, Department of Obstetrics and Gynecology, Academic Teaching Hospital. Five patients referred for premature ejaculation, three for excessive fluid secreted during foreplay and four normal healthy ...
Evans Karen - - 2003
Blubber thickness (n=102) and lipid content (n=37) were measured in sperm whales from three mass stranding events on the west and north-west coasts of Tasmania, Australia in February 1998. Blubber thickness was highly variable, ranging from 43.0 to 168.0 mm (mean 98.4+/-18.4 mm) while lipid fat content, also highly variable, ...
Makkar Guneet - - 2003
BACKGROUND: This prospective study compared the acrosome reaction following ionophore challenge (ARIC) versus conventional sperm parameters and sperm velocities in predicting successful outcome following ovarian stimulation and intrauterine insemination. METHODS: All patients were offered a maximum of three treatment cycles. Conventional semen analysis was performed and sperm velocities were measured ...
Porcu G - - 2003
We report ICSI pregnancies in two couples with a history of long standing primary infertility in which the sperm of the male partner were either acephalic or had abnormal head-midpiece attachments. The two couples, in which the men are brothers, underwent ICSI. Sperm were analysed by transmission electron microscopy and ...
Vernaeve Valérie - - 2003
OBJECTIVE: To assess the efficiency of intracytoplasmic sperm injection (ICSI) using testicular spermatozoa in cases of nonobstructive azoospermia. DESIGN: Retrospective case series. SETTING: Tertiary university-based infertility center. PATIENT(S): Overall, 595 couples were included. In 360 couples, the man had normal spermatogenesis. In 118, 85, and 32 couples the man had ...
Katayose Haruo - - 2003
OBJECTIVE: To investigate the influence of human sperm nuclear chromatin on fertilization. DESIGN: Prospective study. SETTING: Assisted reproductive technology unit at a university teaching hospital. PATIENT(S): Fifty men starting an IVF-ET program. INTERVENTION(S): Epifluorescent microscopic observation of human-ejaculated sperm nuclei stained with diamide-acridine orange. Sodium dodecyl sulfate-polyacrylamide gel electrophoresis (SDS-PAGE) ...
Qiu Yi - - 2003
AIM: To manage male infertility with obstructive azoospermia by means of percutaneous epididymal sperm aspiration (PESA) and intrauterine insemination (IUI). METHODS: Ninety azoospermic patients with congenital bilateral absence of the vas deferens (BAVD, n=58) or bilateral caudal epididymal obstruction (BCEO, n=32) requesting for fine needle aspiration (FNA), PESA and IUI ...
Qiu Yi - - 2003
OBJECTIVE: To explore the effectiveness of percutaneous vasal sperm aspiration (PVSA) in combination with intrauterine insemination (IUI) to treat infertile men with anejaculation. DESIGN: Clinical study. SETTING: Department of reproductive endocrinology and andrology of a family planning research clinic. PATIENT(S): Twenty-six anejaculatory infertile men. INTERVENTION(S): Spermatozoa obtained from the vas ...
Khadra A Abu - - 2003
PURPOSE: We determined the feasibility of obtaining mature spermatozoa for intracytoplasmic sperm injection (ICSI) by percutaneous testicular sperm aspiration in men with nonobstructive azoospermia. We also compared the results of ICSI using spermatozoa recovered by open excisional biopsy versus percutaneous testicular sperm aspiration. MATERIALS AND METHODS: A total of 84 ...
Ludwig Michael - - 2003
BACKGROUND: There is an ongoing debate as to whether the outcome of ICSI is affected by the origin of sperm used or by the severity of male factor infertility. METHODS: Data from a multicentric prospective, controlled cohort study in Germany were analysed to look for differences in pregnancy course and ...
Shen Shehua - - 2003
OBJECTIVE: To identify and evaluate the statistically significant predictors of intracytoplasmic sperm injection (ICSI) fertilization rates and clinical pregnancy in a single population using appropriate statistical techniques. DESIGN: Retrospective study. SETTING: Fertility and Endocrinology Center, University of Washington Medical Center, Seattle, Washington. PATIENT(S): Four hundred forty-one patients undergoing their first ...
Wood Simon - - 2003
We wished to determine whether the interval between surgical retrieval of epididymal and testicular spermatozoa in obstructive azoospermia and their subsequent use in intracytoplasmic sperm injection (ICSI) has an effect on their fertilizing capacity and pregnancy rates in patients undergoing ICSI. This was a retrospective review of 164 consecutive cycles ...
Willenburg K L - - 2003
The effect of boar exposure during artificial insemination (AI) on semen backflow, fertilization, and embryo quality was evaluated. Gilts (approximately 170 d) were induced into estrus with PG600, and ovulation was synchronized using hCG 72 h later. Estrus detection was initiated after PG600 and continued at 12-h intervals. At estrus, ...
Carrell D T - - 2003
Previous studies have indicated that sperm quality may be related to unexplained recurrent pregnancy loss. This study evaluated the degree of sperm DNA fragmentation using the TUNEL assay on sperm from 24 couples with unexplained recurrent pregnancy loss (RPL) compared to sperm from 2 control groups: donors of known fertility ...
George Susan Shanti - - 2003
BACKGROUND: Male factor abnormality is the cause of infertility in about 20%-40% of infertile couples. Assisted reproduction with intracytoplasmic sperm injection is the only treatment option for severe forms of andrological infertility. METHODS: We retrospectively analysed patients who had had intracytoplasmic sperm injection for male factor infertility. The clinical and ...
Bloch Qazi M C - - 2003
In polyandrous mating systems, events occurring during copulation can alter the fate of the mating male's sperm. These events may exert selective pressures resulting in the evolution of diverse reproductive behaviours, morphologies and physiologies. This study investigates the role of male and female copulatory behaviours on sperm fate in the ...
Zahalsky Michael P - - 2003
OBJECTIVE: To assess the ability of Kruger morphology to predict the outcome of the sperm penetration assay (SPA). DESIGN: A retrospective review using univariate and multivariate analysis, t tests, and logistic regression was performed to examine the correlation between Kruger morphology and the optimized zona-free hamster egg sperm penetration assay ...
Schwarzer J Ullrich - - 2003
INTRODUCTION: Male infertility caused by azoospermia due to non-reconstructable obstruction or non-obstructive azoospermia can be treated by microsurgical epididymal aspiration (MESA) or testicular sperm extraction (TESE) followed by an intracytoplasmatic spermatozoa injection (ICSI). MATERIAL AND METHODS: From 9/93 to 6/01, we carried out 1,025 ICSI procedures with aspirated epididymal or ...
Kolettis Peter N - - 2003
We conducted an evaluation of outcomes for microsurgical vasectomy reversal in which sperm are absent from the vas fluid in order to determine a threshold obstructive interval when vasoepididymostomy (VE) may be indicated. Vasectomy reversal was performed for 32 patients with intravasal azoospermia: 25 received bilateral vasovasostomy (VV), 1 had ...
Fuse H - - 2003
The Acrobeads test was performed on semen samples from 43 patients with varicocele before and after varicocelectomy. Sperm motility significantly increased after surgery (p <.05), while sperm concentration and motile sperm concentration did not alter postoperatively. Sperm motion analysis using CellSoft 3000 did not demonstrate a significant change after treatment. ...
De Vos Anick - - 2003
OBJECTIVE:To evaluate the influence of morphology of individual spermatozoa on fertilization and pregnancy outcome. DESIGN: Retrospective analysis. SETTING: An IVF center in an institutional research environment. PATIENT(S): Fertilization and embryo quality according to individual sperm morphology were analyzed in 662 consecutive ICSI cycles. Pregnancy outcome was evaluated for these cycles ...
Debrock Sophie - - 2003
A randomized controlled trial was set up to test the hypothesis that the fertilization rate of oocytes after intracytoplasmic sperm injection (ICSI) is higher after immobilization of the spermatozoa with the Fertilase-laser system technology than after immobilization of the spermatozoa with the conventional mechanical method. Metaphase II oocytes were injected ...
van Rumste M M E - - 2003
In vitro fertilisation (IVF) as treatment for male factor subfertility is associated with lower fertilisation and pregnancy rates than for other indications. Since the late 1980s several assisted fertilisation techniques have emerged and have been rapidly developed to try to enhance results for couples with male factor subfertility, or to ...
Ishijima Sumio - - 2002
Electron microscopic examination of the spermatozoa from a man suffering from asthenozoospermia (poor or low sperm motility) showed that approximately 92% of the sperm flagella lacked central pair microtubules but possessed dynein arms and radial spokes while a small percentage of the spermatozoa had complete flagella. The characteristics of the ...
Rouzi Abdulrahim A - - 2002
OBJECTIVE: To report the results of repeat intracytoplasmic sperm injection (ICSI) after complete failure of fertilization with initial ICSI. METHODS: The medical records of the couples undergoing repeat ICSI at the Human Reproductive Biology Unit, Soliman Fakeeh Hospital, Jeddah, Kingdom of Saudi Arabia, after complete failure of fertilization by initial ...
Alosilla Fonttis A - - 2002
The use of IVF and intracytoplasmic sperm injection (ICSI) to treat male infertility due to severe asthenozoospermia in cases of electron microscopically confirmed axonemal abnormalities has been reported. However, even with these sophisticated technologies, very few pregnancies and births have been achieved with ejaculated spermatozoa in infertility due to this ...
Burrows Peter J - - 2002
The success of a comprehensive office-based evaluation of male-factor infertility depends on the physician's thorough understanding of risk assessment in the history, identification of pertinent physical examination findings, and correct assessment of laboratory data. Office-based ultrasonographic techniques have already increased the urologist's ability to visualize suspected anatomic abnormalities, and the ...
Kolettis Peter N - - 2002
OBJECTIVES: To determine the outcomes for vasectomy reversal performed after at least 10 years of obstruction. METHODS: We performed a retrospective review of three surgeons' experience with microsurgical vasectomy reversal for obstructive intervals of at least 10 years. RESULTS: The overall pregnancy rate was 37%. The patency/pregnancy rate for an ...
Agarwal Ashok - - 2002
Interest in the physiologic and pathologic effects of ROS on male fertility is growing. The controlled generation of very low amounts of ROS seems to regulate the acquisition of sperm-fertilizing ability. High levels of ROS endanger sperm function and viability. Oxidative stress can arise as a consequence of excessive production ...
Nakamura S - - 2002
BACKGROUND: Centrosomal function and oocyte activation ability of human sperm from a case of globozoospermia was assayed by heterologous ICSI into bovine oocytes. METHODS: Microtubules and chromatin configuration in bovine oocytes were examined by immunofluorescence after heterologous ICSI with human sperm from two fertile donors and from a globozoospermic man. ...
Ludwig Michael - - 2002
The course of pregnancies and the health of children born after assisted reproductive technologies are two of the most important outcome parameters of the quality of the techniques. There is an ongoing discussion as to whether these parameters may show poorer results as compared with spontaneous conception. Recent studies have ...
Lee Robert Kuo-Kuang - - 2002
The objective of this study was to investigate the predictive value of Kruger's criteria for sperm morphology on intrauterine insemination (IUI) outcome. A total of 209 infertile patients underwent 244 IUI treatment cycles. These include 75 couples (80 cycles) with teratozoospermia and 134 couples (164 cycles) with unexplained infertility. The ...
Katayama Mika - - 2002
BACKGROUND: ICSI bypasses the sperm-oolemma interactions that, in normal fertilization, depend on completion of the acrosome reaction. Morphological changes in the acrosomes of sperm in the ooplasm were therefore examined following IVF and ICSI using pig gametes. METHODS: In-vitro-matured porcine oocytes were used for ICSI or IVF. Oocytes were then ...
Göker Ege N Tavmergen - - 2002
OBJECTIVE(S): To compare fertilization rates, quality of embryos, pregnancy rates (PRs) and outcome of pregnancies in intracytoplasmic sperm injection (ICSI) using sperm from ejaculates of normal and abnormal semen and testicular sperm of non-obstructive azoospermia. STUDY DESIGN: Four hundred fifty-four patients who underwent 454 ICSI cycles were evaluated retrospectively. Patients ...
Nakagawa K - - 2002
The authors evaluated whether scheduled ovarian stimulation makes it easy to perform ICSI with fresh testicular sperm. Scheduled ovarian hyperstimulation was applied for testicular sperm extraction and ICSI with fresh testicular spermatozoa. Fifteen cycles in 10 couples were included in the present study; all couples were azoospermic, 5 were obstructive, ...
Rawe V Y - - 2002
BACKGROUND: In the present report we analyse the structural and functional features of sperm from a patient with severe asthenoteratozoospermia and failure of cleavage after ICSI. METHODS: Sperm were studied by phase contrast and transmission electron microscopy and microinjected into bovine oocytes to examine aster formation using antibodies against acetylated ...
Osmanagaoglu Kaan - - 2002
OBJECTIVE: To analyze the occurrence of deliveries after spontaneous conception in patients who have discontinued unsuccessful intracytoplasmic sperm injection (ICSI) treatment. DESIGN: Cohort follow-up study. SETTING: Tertiary referral center. PATIENT(S): Between July 1992 and December 1993, 200 Belgian women younger than 37 years underwent 433 consecutive unsuccessful ICSI cycles with ...
< 5 6 7 8 9 10 11 12 13 14 15 >