نتایج جستجو برای: preantral follicle
تعداد نتایج: 21081 فیلتر نتایج به سال:
The primary therapeutic goal for the oncology patient is survival. Recent advances in diagnoses and treatment of neoplasia have resulted in an ever-increasing number of patients being cured and resuming a normal life. However, recognized side effects of treatments used to eradicate malignancies are temporary or permanent sterility. The cryopreservation of ovarian tissue harvested before cancer ...
Anti-Müllerian hormone (AMH) is secreted from the preantral and small antral follicles. It regulates follicle development and inhibits follicular atresia. This study examined how age, parity, and time after parturition affect plasma AMH concentrations in Japanese Black cows. We measured plasma AMH concentrations in primiparous, secundiparous, and multiparous (third parity or higher) cows at fou...
The present study was aimed to study the effect of an ovine follicular fluid peptide on ovarian follicle and good oocyte numbers and weights of ovary, uterus, liver, pancreas and kidney in rats, R. norvegicus. A 30.1 kDa peptide was isolated from ovine follicular fluid by ammonium sulphate precipitation and then gel filtration. The peptide was tested at various levels in normal (22 and 36 day-o...
Seasonal changes in the number of polyovular follicles were estimated in a Vespertilionid bat, Scotophilus heathi. The largest number of polyovular follicles was observed during September, which coincided with the period of maximum development of intra-ovarian rete cells cord. It has been suggested that interaction between rete cells cord and follicle may be responsible for giving rise to a num...
The dimeric glycoprotein anti-Müllerian hormone (AMH) is a member of the transforming growth factor-beta superfamily of growth and differentiation factors. During male fetal sex differentiation, AMH is produced by Sertoli cells and induces degeneration of the Müllerian ducts, which form the anlagen of part of the internal female genital system. In females, AMH is produced by the ovary, but only...
The development of techniques allowing the growth of primordial follicles to mature follicles in vitro has much potential for both reproductive medicine and developmental research. However, human primordial and preantral follicles fail to grow after isolation from the surrounding ovarian stroma. Granulosa cells, which normally undergo apoptosis after ovulation, contain a subpopulation of ovaria...
The effects of radiation and chemotherapy on gonadal function are relevant to the morbidity induced by such treatments. Cyclophosphamide given i.p. to rats on Day 30 of age delayed vaginal opening, prevented vaginal cyclicity, and caused a reduction in serum estradiol and progesterone. Antral follicular atresia increased in a dose-dependent fashion in response to cyclophosphamide (0 mg/kg, 53.5...
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