نتایج جستجو برای: abnormal embryo
تعداد نتایج: 190475 فیلتر نتایج به سال:
Abstract Study question What is the incidence of chromosomal mosaicism in trophectoderm and inner cell mass from good quality human blastocysts after NGS-based single-cell molecular karyotyping? Summary answer Single-cell analysis showed that almost all are mosaic, involving low level and/or abnormal cells resulting reciprocal error events. known already Chromosome segregation early embryos con...
There is a high incidence of chromosome abnormalities in human embryos that leads to failed IVF cycle. Different studies have shown maternal age the determining factor appearance chromosomal alterations embryo. However, possible influence ovarian stimulation on oocyte and embryo aneuploidies mosaicism controversial. A retrospective study was carried out which 835 from 280 couples undergoing rep...
mdash; Plant regeneration from immature intergeneric embryos through direct callus induction was investigated in the case of hybridization between T aestivum cv Chinese Spring (2n = 6x = 42, AABBDD) and A cristatum 4x with one B chromosome (2n = 4x = 28 + 1 B, PPPP). Twenty-three abnormal immature hybrid embryos were directly cultured on MS solid medium with 2 mg / L 2,4-D to induce calli which...
Case report: pregnancy outcome following ICSI of oocytes with abnormal cytoplasm and zona pellucida.
A couple with unexplained infertility was referred for routine IVF and ICSI treatment. Ovulation was induced by the GnRH analogue protocol combined with HMG and HCG. Preparation of denuded oocytes revealed a major disorder of the zona pellucida and abnormal oocytes. During preparation of ova for ICSI, 15 retrieved oocytes were denuded, 14 of which underwent ICSI treatment. Four of the oocytes c...
BACKGROUND To preclude transfer of aneuploid embryos, current preimplantation genetic screening (PGS) usually involves one trophectoderm biopsy at blastocyst stage, assumed to represent embryo ploidy. Whether one such biopsy can correctly assess embryo ploidy has recently, however, been questioned. METHODS This descriptive study investigated accuracy of PGS in two ways. Part I: Two infertile ...
The zygote in flowering plants usually divides transversely to form a terminal cell, which gives rise to the embryo proper, and a vacuolated basal cell, which often divides rapidly to form a structure known as the suspensor. Angiosperm suspensors vary widely in size and morphology from a single cell to a massive column of several hundred cells (Maheshwari, 1950; Wardlaw, 1955; Lersten, 1983). I...
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