منابع مشابه
Chromosomal analysis of unfertilized human oocytes.
Unfertilized human oocytes were obtained from women in an in-vitro fertilization programme. The women had a mean age of 29.4 years (range 24-35 years). Chromosomal complements could be analysed in 50 oocytes. Q-banding of the chromosomes facilitated identification of individual chromosomes: 34 oocytes (68%) had the normal haploid chromosomal complement, 14 complements were hypohaploid (28%), 1 ...
متن کاملApoptosis in human unfertilized oocytes after intracytoplasmic sperm injection.
OBJECTIVE To investigate the presence of programmed cell death in unfertilized oocytes after intracytoplasmic sperm injection (ICSI), assuming that previous apoptotic events could be correlated with the fertilization failure. DESIGN Comparison of the rate of DNA fragmentation in human oocytes at different stages of maturation soon after pick-up (control) and in unfertilized oocytes after ICSI...
متن کاملAbnormal mitochondrial structure in human unfertilized oocytes and arrested embryos.
To clarify the relationship between mitochondria and embryo development, we collected human unfertilized oocytes, early embryos, and arrested embryos. Unfertilized oocytes and poor-quality embryos were collected, and the ultrastructure of mitochondria was determined by transmission electron micrography. Four criteria for determining the mitochondrial state were mitochondrial morphology, cristae...
متن کاملRescue ICSI of unfertilized oocytes after IVF.
BACKGROUND Failed fertilization after IVF occurs in 10-20% of cycles. Conflicting results of rescue fertilization by ICSI have been reported. We therefore compared the success rate in terms of fertilization and pregnancy of cycles in which rescue ICSI was performed with those from a matched control group of primarily ICSI cycles. METHODS Unfertilized oocytes from IVF cycles with total fertili...
متن کاملEffect of calcium ionophore on unfertilized oocytes after ICSI cycles
BACKGROUND Fertilization failure is one of the most problems in assisted reproduction technology (ART). OBJECTIVE The aim of this study was the evaluation of oocytes activation by addition of calcium ionophore in unfertilized oocytes in ICSI cycles. MATERIALS AND METHODS This study was done on 15 ICSI cycles (stimulated with standard long protocol). Mature retrieved oocytes with normal morp...
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ژورنال
عنوان ژورنال: Reproduction
سال: 1988
ISSN: 1470-1626,1741-7899
DOI: 10.1530/jrf.0.0840647