نتایج جستجو برای: preantral
تعداد نتایج: 599 فیلتر نتایج به سال:
It has been shown that chronic exposure to cypermethrin (CPM), a pyrethroid pesticide, results in follicular atresia via pathologically affecting angiogenesis, disrupting endocrine potential and enhancing oxidative stress. This study was aimed to uncover the CPM-exposed energy dependent follicular cells apoptosis and to estimate protective effect of vitamin E (VitE) as a potent antioxidant. Thi...
Background: In vitro culture (IVC) of isolated preantral follicles from cryopreserved ovarian tissue might be an efficient method for enhancing mature oocytes in patients who are exposed to infertility. Materials and Methods: Ovaries of 13-day old NMRI mice were removed and randomly placed into control,needle immersed (NIV) and solid surface vitrification (SSV) groups. For vitrification, ovarie...
Mammalian females are born with a finite number of nonrenewing primordial follicles, the majority of which remain in a quiescent state for many years. Because of their nonrenewing nature, these "resting" oocytes are particularly vulnerable to xenobiotic insult, resulting in premature ovarian senescence and the formation of dysfunctional oocytes. In this study, we characterized the mechanisms of...
objective: improvements in cancer treatment have allowed more young women to survive. however, many cancer patients suffer from ovarian failure. cryopreservation is one of the solutions for fertility restoration in these patients. the cryopreservation of isolated follicles is a more attractive approach in the long term. many endocrine and paracrine factors can stimulate the granulosa cells of p...
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