نتایج جستجو برای: abnormal embryo
تعداد نتایج: 190475 فیلتر نتایج به سال:
CCCTC-binding factor (CTCF) is the major protein involved in insulator activity in vertebrates, with widespread DNA binding sites in the genome. CTCF participates in many processes related to global chromatin organization and remodeling, contributing to the repression or activation of gene transcription. It is also involved in epigenetic reprogramming and is essential during gametogenesis and e...
BACKGROUND Polycystic ovary syndrome (PCOS) patients are at increased risk of pregnancy complications, which may impair pregnancy outcome. Transfer of fresh embryos after superovulation may lead to abnormal implantation and placentation and further increase risk for pregnancy loss and complications. Some preliminary data suggest that elective embryo cryopreservation followed by frozen-thawed em...
Every year numerous females are detected infertile as infertility becomes a major problem in reproductive lives, worldwide. The purpose of this study is to evaluate the effectiveness intrauterine infusion autologous platelet-rich plasma (PRP) women undergoing frozen embryo transfer cycles with suboptimal endometrium. A total 61 between 22 40 years age were included study. Based on hysteroscopy ...
PGD (preimplantation genetic diagnosis) of aneuploidy for chromosomes X, Y, 13, 18 and 21 was carried out on 196 embryos from 36 infertile patients classified with a poor prognosis due to (i) maternal age, (ii) repeated in-vitro fertilization (IVF) failures and (iii) mosaic karyotype. The percentage of abnormal embryos was comparable in the three groups of patients: maternal age 63%, repeated I...
Imprinting disorder during somatic cell nuclear transfer usually leads to the abnormality of cloned animals and low cloning efficiency. However, little is known about the role of donor cell imprinting in the development of cloned embryos. Here, we demonstrated that the imprinting (H19/Igf2) in porcine fetus fibroblasts derived from the morphologically abnormal cloned fetuses (the abnormal impri...
One of the most important factors related to male fertility is sperm chromatin status. Under Assisted Reproductive Techniques (ART), especially Intracytoplasmic Sperm Injection (ICSI), the natural selection of high quality sperm with intact chromatin is not possible. Therefore, embryo quality and pregnancy rate decreased for damaged DNA of sperms involved in the fertilization of eggs. Thus, thi...
Previous cases reported recurrent all oocytes in repeated cycles were arrested at MI failed to mature after culture and ICSI resulted total nonfertilization. Ionomycin induced first PB extrusion patients with maturation-resistant oocytes. combined assisted oocyte activation (AOA) on MII matured vitro abnormal fertilization no further embryo cleavage potential. The objective of this work was res...
background: embryo morphology has been proposed as an alternative marker of chromosomal status. the objective of this retrospective cohort study was to investigate the association between the chromosomal status on day 3 of embryo development and blastocyst morphology.embryo morphology has been proposed as an alternative marker of chromosomal status. the objective of this retrospective cohort st...
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