chromosome number, meiotic behavior, and pollen viability were analyzed in 2 species of genus solenanthus, s. stamineus (desf.) wettst. and s. circinnatus ledeb, from iran. this report is the first cytogenetic analysis of these species. all taxa are diploid and possess 2n = 2x = 24 chromosome number, consistent with the proposed base number of x = 12. although this taxon displayed regular bival...

introduction: the types and incidence of the chromosomal abnormalities in failed fertilized oocytes that were taken after routine in vitro fertilization (ivf) and intracytoplasmic sperm injection (icsi) programs were investingated in patients referred the royan institute. materials and method: in this study, 364 air-dried preparation of failed fertilized oocytes after either ivf (91 samples) or...

The present study reports the chromosome number and meiotic behaviour of 14 populationsbelonging to four taxa of Anchusa subgenus Buglossum Gusul. from Iran. All populationsshowed the chromosome number 2n= 4x= 32. It is the first meiotic study for A. subg.Buglossum. We discuss some habit form and evolutionary aspect in the light of cytogeneticdata. The origin of polyploidy (auto-allopolyploidy)...

chromosomal abnormalities are major causes of infertility, miscarriage and birth of handicapped progeny. in human live births, the prevalence of a chromosome aberration is ?0.5% and, of these, 0.1–0.3% correspond to structural chromosome rearrangements such as translocations, inversions, insertions and deletions .our proband is an infant who had died 4 hours after birth due to a variety of abno...

introduction: the incidence of chromosomal abnormalities was investigated in untransfered embryos reuslted from in vitro fertilization (ivf) or intracytoplasmic sperm injection (icsi) procedures. materials and methods: a total of 238 embryos of varying morphology between the pronucleated stage and 8-cells were analysed. the cytogenetic method of dyban was used for chromosome preparation. embryo...

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...