early identification of fetuses with chromosomal abnormalities enables health care providers to form an appropriate management plan for each patient. the main objective of this study was to determine the role of ultrasonography in screening and identifying fetuses at risk for chromosomal abnormalities. a retrospective review of 6480 patients from the obstetrics and gynecology ward of firouzgar ...

background chromosomal aberrations are one of the most common causes of mental retardation (mr). objectives in this study, in order to identify the rate of chromosomal abnormalities in idiopathic mr, 50 mr patients at a charity center in hamadan, iran, were investigated. methods fifty mentally retarded male patients without specific chromosomal abnormalities (e.g., down syndrome, fragile x synd...

objective: chromosomal aberrations are common causes of multiple anomaly syndromes. recurrent chromosomal aberrations have been identified by conventional cytogenetic methods used widely as one of the most important clinical diagnostic techniques. materials and methods: in this retrospective study, the incidences of chromosomal aberrations were evaluated in a six year period from 2005 to 2011 i...

background: recurrent miscarriage is defined as two or more recurrent spontaneous miscarriages. several causes have been suggested, among which, chromosomal abnormalities in couples is considered to have a role in this regard. however, its significance varies among different populations. the present study was carried out to evaluate the prevalence of chromosomal aberrations in couples with recu...

about 15% of couples have infertility problems, half of which are related to male factors. cytogenetic and genetic disorders account for about 10% of the male infertility problems. the aim of this study was to determine the frequency and types of both cytogenetic abnormalities and azf microdeletions of y chromosome in idiopathic azoospermic and oligospermic infertile men in west of iran. in thi...

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introduction: the prevalence of somatic chromosomal abnormalities in infertile male individuals has been reported to vary in different literatures. the aim of this study was to investigate the frequency of chromosomal aberrations among infertile men referred to the cytogenetic laboratory of iran blood transfusion organization research centre (ibto). materials and methods: chromosomal analysis w...

Background Cytogenetic study of reproductive wastage is an important aspect in determining the genetic background of early embryogenesis. Approximately 15 to 20% of all pregnancies in humans are terminated as recurrent spontaneous abortions (RSAs). The aim of this study was to detect chromosome abnormalities in couples with RSAs and to compare our results with those reported previously. Materia...

Background Selecting the best embryo for transfer, with the highest chance of achieving a vital pregnancy, is a major goal in current in vitro fertilization (IVF) technology. The high rate of embryonic developmental arrest during IVF treatment is one of the limitations in achieving this goal. Chromosomal abnormalities are possibly linked with chromosomal arrest and selection against abnormal fe...