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Featured researches published by N. Zabludovsky.


Archives of Andrology | 1997

EFFECT OF ACUPUNCTURE ON SPERM PARAMETERS OF MALES SUFFERING FROM SUBFERTILITY RELATED TO LOW SPERM QUALITY

S. Siterman; Fina Eltes; V. Wolfson; N. Zabludovsky; Benjamin Bartoov

The aim of this prospective controlled study was to assess the effect of acupuncture on the sperm quality of males suffering from subfertility related to sperm impairment. Semen samples of 16 acupuncture-treated subfertile patients were analyzed before and 1 month after treatment (twice a week for 5 weeks). In parallel, semen samples of 16 control untreated subfertile males were examined. Two specimens were taken from the control group at an interval of 2-8 months. The expanded semen analysis included routine and ultramorphological observations. The fertility index increased significantly (p < or = .05) following improvement in total functional sperm fraction, percentage of viability, total motile spermatozoa per ejaculate, and integrity of the axonema (p < or = .05), which occurred upon treatment. The intactness of axonema and sperm motility were highly correlated (corr. = .50, p < or = .05). Thus, patients exhibiting a low fertility potential due to reduced sperm activity may benefit from acupuncture treatment.


Archives of Andrology | 1999

Quantitative ultramorphological analysis of human sperm: fifteen years of experience in the diagnosis and management of male factor infertility.

Benjamin Bartoov; Fina Eltes; M. Reichart; J. Langzam; H. Lederman; N. Zabludovsky

The advantages of quantitative ultramorphological (QUM) sperm analysis in the diagnosis and treatment of male infertility are presented. The QUM methodology is based on three elements: complementary scanning electron microscopy and transmission electron microscopy observations of 7 sperm cell subcellular organelles (acrosome, postacrosomal lamina, nucleus, neck, axoneme, mitochondrial sheath, and outer dense fibers); systematic classification of the specific ultramorphological malformations into 4 pathological and the normal categories, indicating the morphological state of each subcellular organelle; and comparison between well-defined reference groups with opposite fertility status or treatment conditions. QUM has established 2 indices for the in vivo and in vitro male fertility potential: (1) Natural Fertility Index (NFI), with accurate prediction (97% sensitivity and 90% specificity) of 80% of the male patients; and (2) IVF score, with prediction of 76% of the nonfertilizing and 90% of fertilizing IVF groups. QUM has enabled assessment of ultramorphological indications for varicocele and radiation exposure. Varicocele causes defects in sperm head organelles related to early spermatid development, whereas ionizing radiation causes amorphous head shape. QUM established criteria for specific non-in-vitro therapeutic interventions, including varicocelectomy, follicle-stimulating hormone (FSH) administration, and acupuncture. The varicocele index enabled correct classification of 79 and 89% of patients with and without varicocele. Males with idiopathic impairment of sperm acrosome and nucleus are potential responders to FSH treatment, whereas patients exhibiting low sperm activity are candidates for acupuncture treatment. Patients with a low Natural Fertility Index are recommended for an assisted reproduction technique (ART). based on the ultramorphology of the tail axoneme. Patients who achieved pregnancy following intrauterine insemination or in vitro fertilization and those whose wives conceived only following intracytoplasmic sperm injection were classified with accuracy of 78 and 74%, respectively. QUM sperm analysis is clinically informative, nontraumatic, and cost-effective, and is recommended when the male infertility factor cannot be clearly diagnosed by routine tests prior to first ART trial.


Archives of Andrology | 1999

QUANTITATIVE ULTRAMORPHOLOGICAL (QUM) ANALYSIS OF HUMAN SPERM: DIAGNOSIS AND MANAGEMENT OF MALE INFERTILITY

Benjamin Bartoov; Fina Eltes; M. Reichart; J. Langzam; H. Lederman; N. Zabludovsky

The advantages of quantitative ultramorphological (QUM) sperm analysis in the diagnosis and treatment of male infertility are presented. QUM methodology is based on three elements: (1) complementary SEM and TEM observations of 7 sperm cell subcellular organelles: acrosome, postacrosomal lamina, nucleus, neck, axoneme, mitochondrial sheath, and outer dense fibers; (2) systematic classification of the specific ultramorphological malformations into 4 pathological and the normal categories, which indicate the morphological state of each subcellular organelle; and (3) comparison between well-defined reference groups with opposite fertility status or treatment conditions. QUM analysis has enabled the establishment of two indices that optimally express the in vivo and in vitro male fertility potential: The Natural Fertility Index (NFI), which allowed an accurate prediction (97% sensitivity and 90% specificity) of 80% of the naturally fertile and suspected infertile male patients, and the in vitro fertilization (IVF) score, which enabled prediction of 76% of the nonfertilizing and 90% of the fertilizing IVF groups. Validation tests confirmed these data. QUM also enabled assessment of ultramorphological indications for varicocele and radiation exposure: Both male factor etiologies indicated a persistent effect on the natural fertility potential, as expressed by structural changes in the nucleus. Varicocele was found to cause defects in the sperm head organelles related to early spermatid development, whereas ionizing radiation resulted in amorphous head shape. Criteria for specific non-in vitro therapeutic interventions such as varicocelectomy, follicle-stimulating hormone (FSH) administration, and acupuncture treatment were established. A varicocele index, which enabled the correct classification of 79 and 89% of the patients pre- and post-high ligation, respectively, was suggested to be a good indicator for varicocele which affects the fertility potential. Males exhibiting idiopathic impairment of sperm acrosome and nucleus were found to be potential responders to FSH treatment, whereas patients exhibiting low sperm activity proved to be good candidates for acupuncture treatment. Indications for selecting the optimal appropriate assisted reproduction technique (ART) procedure were found: Patients with a low Natural Fertility Index should be recommended for ART. A first choice ART selection should be performed according to an ART index based on the ultramorphological examination of the tail axoneme. The above index enabled correct prediction of 78% of the patients who achieved pregnancy following conventional ART (intrauterine insemination or IVF) and 74% of those whose wives conceived only following intracytoplasmic sperm injection. QUM sperm analysis is clinically informative, nontraumatic, and in the long run also cost-effective. This analysis should be performed when the male infertility factor cannot be clearly diagnosed by routine tests and prior to the first ART trial.


Fertility and Sterility | 1995

Ultrastructural changes in sperm with improved fertilizability after treatment with egg yolk

Yona Barak; Benjamin Bartoov; Joseph B. Lessing; Fina Eltes; N. Zabludovsky; Ami Amit

OBJECTIVES To determine the existence of differences in the ultrastructural parameters between the medium-washed sperm samples of the affected and nonaffected egg yolk (EY) groups and to verify whether ultrastructural changes occur in the EY-affected spermatozoa after EY preincubation. SETTING The study was performed in the Laboratory of the IVF Unit, Serlin Maternity Hospital, and the Laboratory of Male Fertility, Bar-Ilan University, Ramat Gan, Israel. PATIENTS The positive group included 12 males who underwent 1.9 IVF cycles with 0% fertilization rate that increased to 68% after EY treatment. The negative group included 11 males with 1.2% fertilization rate in 1.1 IVF cycles with no improvement after preincubation of spermatozoa in EY. RESULTS Compared with the laboratory standard, patients of both groups exhibited a lower normalcy of the head sperm cell subcellular organelles. With EY treatment, the positive group exhibited a decrease in the frequency of some sperm head organelle specific malformations. CONCLUSIONS Fertilization capacity of mature spermatozoa might be reduced because of an excess of acrosome malformations, postacrosomal lamina, and chromatin caused by in vitro sperm manipulations. The manipulation effect may be avoided by EY treatment.


Journal of Assisted Reproduction and Genetics | 1996

Relationship between anticomplement in seminal plasma and complement in follicular fluid associated with outcome in an in vitro fertilization program

N. Zabludovsky; Yona Barak; Benjamin Bartoov; Tamar Lublin-Tennenbaum; Fina Eltes; Ami Amit; Abraham Kogosowski

AbstractPurpose: The study was conducted to evaluate levels of anticomplement in seminal plasma and levels of complement in follicular fluid, in correlation with fertilization and pregnancy rate after in vitro fertilization and intracytoplasmic sperm injection programs. Materials and Methods: Anticomplement levels were determined in 70 couples undergoing in vitro fertilization therapy. In 15 of these couples, complement levels were measured. Anticomplement and complement levels were also determined in an additional 21 couples (apart from the 70 couples) undergoing intracytoplasmic sperm injection treatment. Results: A correlation was found between fertilization rate and anticomplement levels in the seminal plasma (r=0.4,P<0.01) after standard in vitro fertilization. No correlation was found in the intracytoplasmic sperm injection group, or observed between complement levels and any parameter examined in both groups. Pregnancy occurred only in those couples with an anticomplement: complement ratio below 0.49. Conclusions: Determination of anticomplement and complement levels may contribute to the assessment of a successful outcome of in vitro fertilization/intracytoplasmic sperm injection.


Environmental Health Perspectives | 1997

Ultramorphological sperm characteristics in the risk assessment of health effects after radiation exposure among salvage workers in Chernobyl.

Alf Fischbein; N. Zabludovsky; Fina Eltes; Valentin I. Grischenko; Benjamin Bartoov


International Journal of Occupational and Environmental Health | 1997

Semen Quality of Workers Exposed to Ionizing Radiation in Decontamination Work after the Chernobyl Nuclear Reactor Accident

Benjamin Bartoov; N. Zabludovsky; Fina Eltes; Valery V. Smirnov; Valentin I. Grischenko; Alf Fischbein


JAMA | 1996

Health Effects in Survivors of the Chernobyl Disaster

Michael R. Quastel; Julie Cwikel; John R. Goldsmith; Alf Fischbein; Benjamin Bartoov; N. Zabludovsky


Fertility and Sterility | 2009

Impact of new applications of cryoagents on apoptotic marker activity and ultramorphology of bull spermatozoa

N. Zabludovsky; T. Babushkin; Ronen Yehuda


Fertility and Sterility | 2005

Influence of the Immunomodulator Ammonium Trichloro (dioxoethylene-0,0’) Tellurate (AS101) on Human Sperm Apoptotic Markers in Vitro

A. Carmely; Y. Ronen; N. Zabludovsky; B. Sredni; Benjamin Bartoov

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Alf Fischbein

Icahn School of Medicine at Mount Sinai

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Ami Amit

Tel Aviv Sourasky Medical Center

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John R. Goldsmith

Ben-Gurion University of the Negev

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Julie Cwikel

Ben-Gurion University of the Negev

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