Results 21 to 30 of about 420,620 (395)
Apoptosis in mouse fetal and neonatal oocytes during meiotic prophase one [PDF]
, 2007 Background The vast majority of oocytes formed in the fetal ovary do not survive beyond birth. Possible reasons for their loss include the elimination of non-viable genetic constitutions arising through meiosis, however, the ...
Ghafari , Fataneh +2 more
core +4 more sources
Oocyte activation deficiency: a role for an oocyte contribution? [PDF]
Human Reproduction Update, 2015 Infertility affects between 10 and 16% of couples worldwide. Twenty to 30% of cases of infertility are due to a male factor, 20-35% to a female factor, and 25-40% are due to both male and female factors. In ∼10-25% of cases, the precise underlying cause remains unclear.
Yeste, M +4 more
openaire +4 more sources
Journal of Human Reproductive Sciences, 2015 CONTEXT: Ovulation induction in patients with hypogonadotropic hypogonadism (HH) is a challenge to the treating physician. The threshold for ovarian response in HH may differ substantially from that of normal patients.
Monna Pandurangi +2 more
doaj +1 more source
Vitrification of human immature oocytes before and after in vitro maturation: a review [PDF]
, 2017 The use of immature oocytes subjected to in vitro maturation (IVM) opens interesting perspectives for fertility preservation where ovarian reserves are damaged by pathologies or therapies, as in PCO/PCOS and cancer patients. Human oocyte cryopreservation
Ashourzadeh, S +5 more
core +1 more source
Interaction between growing oocytes and granulosa cells in vitro
Reproductive Medicine and Biology, 2019 Oocyte growth is accompanied by follicular development in mammalian ovaries. Since the discovery of two oocyte‐derived factors, growth differentiation factor 9 (GDF9), and bone morphogenetic protein 15 (BMP15), knowledge of the bidirectional ...
M. Alam, T. Miyano
semanticscholar +1 more source
Comparison of Culture Media for In Vitro Maturation of Oocytes of Indigenous Zebu Cows in Bangladesh
Journal of Animal Reproduction and Biotechnology, 2015 The objectives of the present study were to select an effective basic medium including its hormone and protein supplementation for IVM of oocytes of indigenous zebu cows.
Joydev Kumar Singha +3 more
doaj +1 more source
Science Advances, 2019 Compression keeps oocytes dormant. The most immature oocytes remain dormant in primordial follicles in the ovary, ensuring the longevity of female reproductive life.
Go Nagamatsu +4 more
semanticscholar +1 more source
Human Reproduction, 1998 Primary oocytes recovered from small and growing follicles of > or = 3 mm in the ovaries of untreated women, can be matured in vitro, will fertilize and develop in vitro, and when transferred to the patient, develop to term. However, the implantation rate of cleaved embryos has been disappointingly low and when embryos are allowed to develop beyond the
A, Trounson +5 more
openaire +2 more sources
AMP-activated Protein Kinase is Involved in Hormone-induced Mouse Oocyte Meiotic Maturation in vitro [PDF]
, 2008 We have previously shown that AMP-activated protein kinase (AMPK) can induce the resumption of meiosis in mouse oocytes maintained in meiotic arrest in vitro.
Chen, Jing, Downs, Stephen
core +2 more sources
Human Reproduction, 2016 STUDY QUESTION What is the impact of ovarian response on cumulative live birth rates (LBR) following utilization of all fresh and frozen embryos in women undergoing their first ovarian stimulation cycle, planned to undergo single embryo transfer (SET).
P. Drakopoulos +6 more
semanticscholar +1 more source