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Consequences of bovine oocyte maturation, fertilization or early embryo development in vitro versus in vivo: Implications for blastocyst yield and blastocyst quality
TLDR
The results indicate that the intrinsic quality of the oocyte is the main factor affecting blastocyst yields, while the conditions of embryo culture have a crucial role in determining Blastocyst quality. Expand
Follicle numbers are highly repeatable within individual animals but are inversely correlated with FSH concentrations and the proportion of good-quality embryos after ovarian stimulation in cattle.
TLDR
Phenotypic classification based on numbers of follicles may be useful to improve superovulation procedures and the lower proportion of transferable embryos following superovulations of ovaries with high numbers of hair follicles is probably not the result of differences in the quality of oocytes before superovulated. Expand
Antral Follicle Count Reliably Predicts Number of Morphologically Healthy Oocytes and Follicles in Ovaries of Young Adult Cattle1
TLDR
The hypothesis that AFC is positively associated with the number of morphologically healthy oocytes and follicles in ovaries and with serum concentrations of anti-Müllerian hormone (AMH), an indirect marker for number of healthy follicles and oocytes in ovary, is tested. Expand
Culture of in vitro produced bovine zygotes in vitro vs in vivo: implications for early embryo development and quality.
TLDR
It is demonstrated that while bovine zygotes cultured in vitro are capable of rates of development similar to those of their in vivo cultured counterparts, there are significant differences in embryo cryosurvival. Expand
Ultrastructure of bovine blastocysts following cryopreservation: Effect of method of blastocyst production
TLDR
The findings of the present study indicate that in vivo derived blastocysts possess certain structural characteristics that confer a greater tolerance on them to exposure to cryoprotectant and cryopreservation. Expand
Paternal influence on the time of first embryonic cleavage post insemination and the implications for subsequent bovine embryo development in vitro and fertility in vivo
TLDR
It is demonstrated that the kinetics of early embryonic development as measured by the timing of the first cleavage division post insemination vary between different bulls and that these differences can be used to discriminate between bulls of high and low bull field fertility. Expand
Optimization of in vitro bovine embryo production: effect of duration of maturation, length of gamete co-incubation, sperm concentration and sire.
TLDR
The main findings from this study are that the optimal duration of maturation of bovine oocytes in vitro to maximize blastocyst yield is 24 h, and there are marked differences in the kinetics of sperm penetration between sires and this may be a useful predictor of field fertility. Expand
Relationship between time of first cleavage and the expression of IGF‐I growth factor, its receptor, and two housekeeping genes in bovine two‐cell embryos and blastocysts produced in vitro
TLDR
Differences in gene expression in the early embryo are demonstrated that are reflective of differences in developmental competence between early‐ and late‐cleaving zygotes. Expand
Effect of culture system on the yield and quality of bovine blastocysts as assessed by survival after vitrification.
TLDR
In conclusion, a bovine in vitro culture system can affect blastocyst yield and quality and crytolerance is a useful indicator ofblastocyst quality. Expand
Effect of embryo source and recipient progesterone environment on embryo development in cattle.
TLDR
The present study lends strong support to the hypothesis that an earlier rise in progesterone after conception stimulates blastocyst growth and the development of competent embryos. Expand
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