Consequences of bovine oocyte maturation, fertilization or early embryo development in vitro versus in vivo: Implications for blastocyst yield and blastocyst quality

@article{Rizos2002ConsequencesOB,
  title={Consequences of bovine oocyte maturation, fertilization or early embryo development in vitro versus in vivo: Implications for blastocyst yield and blastocyst quality},
  author={Dimitrios Rizos and Fabian Ward and Patrick Duffy and Maurice P. Boland and Pat Lonergan},
  journal={Molecular Reproduction and Development},
  year={2002},
  volume={61}
}
The aim of this study is to examine the effect of bovine oocyte maturation, fertilization or culture in vivo or in vitro on the proportion of oocytes reaching the blastocyst stage, and on blastocyst quality as measured by survival following vitrification. In Experiment 1, 4 groups of oocytes were used: (1) immature oocytes from 2–6 mm follicles; (2) immature oocytes from > 6 mm follicles; (3) immature oocytes recovered in vivo just before the LH surge; and (4) in vivo matured oocytes… Expand
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References

SHOWING 1-10 OF 73 REFERENCES
Development potential of bovine oocytes matured in vitro or in vivo.
Bovine oocytes matured in vivo or in vitro were evaluated after sperm-oocyte incubation for frequency of sperm penetration, frequency of male pronuclei formation, and embryonic development. TheExpand
Fertilization and development capability of bovine follicular oocytes matured in vitro and in vivo and transferred to the oviducts of rabbits and cows.
TLDR
The impaired ability of oocytes matured in vitro, as assessed by nuclear change, to develop normally was confirmed. Expand
Bovine follicular development and its effect on the in vitro competence of oocytes.
TLDR
Two routes to improve the embryo yield in ovum pick-up (OPU) practice are discussed and a thorough understanding of the effect of atresia and other factors on the competence of this highly heterogeneous oocyte population is still missing. Expand
Improved in vitro embryo development using in vivo matured oocytes from heifers superovulated with a controlled preovulatory LH surge.
TLDR
It is concluded that IVM is a major factor limiting in the in vitro production of viable embryos, although factors such as the lack of normal preovulatory development of IVM oocytes contributed to the observed differences. Expand
Effect of follicle size on bovine oocyte quality and developmental competence following maturation, fertilization, and culture in vitro
TLDR
It was found that administration of six injections of pFSH beginning 3 days prior to slaughter resulted in a significant increase in the proportion of follicles >6 mm in diameter compared to that in nontreated controls and to animals that received only four injection groups. Expand
Fertilization and developmental competence of bovine oocytes derived from different categories of antral follicles
TLDR
It is concluded that blastocysts from follicles ranging from >2 to 8 mm in size have a similar developmental potential and oocytes from 1‐ to 2‐mm follicles have a significantly lower competence to undergo in vitro maturation and fertilization and, under the conditions of the authors' experiments, completely lack the capability to cleave beyond the 8‐cell stage. Expand
Factors affecting bovine embryo development in synthetic oviduct fluid following oocyte maturation and fertilization in vitro.
TLDR
This study aimed at improving the efficiency of bovine embryo production under defined and undefined conditions by showing that the addition of fetal calf serum to SOF droplets after 20 to 24 h significantly improved blastocyst yields on Day 6 and changing of the media resulted in a slightly improved Day-6 blastocySt yield such that renewal of serum-free medium mimicked the effect of serum addition. Expand
Oocyte maturation and IVF in cattle
TLDR
It is suggested that the oocyte enters a permissive state when obtained from large and differentiated follicles as in dominance, early atresia or near ovulation, and that the ability to continue to the blastocyst stage is acquired in the follicle. 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
In vitro maturation and attempted fertilization of cattle follicular oocytes.
TLDR
Ova containing pronuclei as well as apparently normal cleaved ova were recovered following in vivo fertilization attempts in the ewe, and growth medium proved superior in terms of final maturation. Expand
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