نتایج جستجو برای: gamete donation
تعداد نتایج: 12565 فیلتر نتایج به سال:
Fertilization requires recognition, attachment, and membrane fusion between gametes. In metazoans, rapidly evolving surface proteins contribute to gamete recognition and adhesion. Flowering plants evolved a double fertilization process wherein two immotile sperm cells are delivered to female gametes by the pollen tube, guided by elaborate communications between male and female reproductive orga...
Introduction: Organ donation is a social action that is based on the individual’s decision in time of life or Family consent at the time of brain death. The present study aimed to investigate the Factors Affecting Tendency to Body Organ Donation. Methods and Materials: This descriptive cross-sectional study was conducted on 330 employees of a military university in 2017. Data were collec...
In animals, microtubules and centrosomes direct the migration of gamete pronuclei for fertilization. By contrast, flowering plants have lost essential components of the centrosome, raising the question of how flowering plants control gamete nuclei migration during fertilization. Here, we use Arabidopsis thaliana to document a novel mechanism that regulates F-actin dynamics in the female gametes...
Background: Organ transplant is considered the treatment of choice for patients with end-stage organ disorders. This process improves recipient’s longevity and quality of life. However, organ shortage for transplantation has remained an unresolved global issue. One of the primary sources of organ donation is brain-dead bodies. The most important factor that impedes the success of donation is la...
The relative energetic investment in reproduction between the sexes forms the basis of sexual selection and life history theories in evolutionary biology. It is often assumed that males invest considerably less in gametes than females, but quantifying the energetic cost of gamete production in both sexes has remained a difficult challenge. For a broad diversity of species (invertebrates, reptil...
BACKGROUND The main goal was to evaluate the attitudes and knowledge of Zoroastrians living in Iran towards oocyte donation (OD) and embryo donation (ED) program. METHODS This cross sectional study consisted of 318 Zoroastrians (n=175 for OD and n=143 for ED) of both sexes. The questionnaire form comprised two parts of general demographic characteristics of the participants and twenty multipl...
in donation contract, the principle is that donor can refer to given property and to take its possession. this principle has some exceptions. one of these exceptions is “donation to children”, which is irrevocable in accordance with the first paragraph of article 803 of civil law. most of the civil law’s writers believe that judgment about donation to children include the donation to grandchild...
Organ donation is one of the most remarkable and dramatic therapeutic advances in medicine during the past 60 years. Expansion of Organ donation has been compelled many countries to legislate about this subject. In our country, Iran, because our acts are based on Islamic jurisprudence it is necessary to study about organ donation in view of jurisprudence. For example the 32th verses of Maedeh S...
BACKGROUND Premature ovarian failure (POF) remains a clinically challenging entity because in vitro fertilisation (IVF) with donor oocytes is currently the only treatment known to be effective. METHODS A 33 year-old nulligravid patient with a normal karyotype was diagnosed with POF; she had a history of failed fertility treatments and had an elevated serum FSH (42 mIU/ml). Oocytes donated by ...
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