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- W2080470551 endingPage "3021" @default.
- W2080470551 startingPage "3014" @default.
- W2080470551 abstract "Reproductive failure in livestock can result from failure to fertilize the oocyte or embryonic loss during gestation. Although fertilization failure occurs, embryonic mortality represents a greater contribution to reproductive failure. Reproductive success varies among species and production goals but is measured as a binomial trait (i.e., pregnancy), derived by the success or failure of multiple biological steps. This review focuses primarily on follicular characteristics affecting oocyte quality, fertilization, and embryonic health that lead to pregnancy establishment in beef cattle. When estrous cycles are manipulated with assisted reproductive technologies and ovulation is induced, duration of proestrus (i.e., interval from induced luteolysis to induced ovulation), ovulatory follicle growth rate, and ovulatory follicle size are factors that affect the maturation of the follicle and oocyte at induced ovulation. The most critical maturational component of the ovulatory follicle is the production of sufficient estradiol to prepare follicular cells for luteinization and progesterone synthesis and prepare the uterus for pregnancy. The exact roles of estradiol in oocyte maturation remain unclear, but cows that have lesser serum concentrations of estradiol have decreased fertilization rates and decreased embryo survival on d 7 after induced ovulation. When length of proestrus is held constant, perhaps the most practical follicular measure of fertility is ovulatory follicle size because it is an easily measured attribute of the follicle that is highly associated with its ability to produce estradiol." @default.
- W2080470551 created "2016-06-24" @default.
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- W2080470551 date "2013-07-01" @default.
- W2080470551 modified "2023-10-16" @default.
- W2080470551 title "TRIENNIAL REPRODUCTION SYMPOSIUM: Influence of follicular characteristics at ovulation on early embryonic survival1,2" @default.
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- W2080470551 doi "https://doi.org/10.2527/jas.2012-5887" @default.
- W2080470551 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/23230106" @default.
- W2080470551 hasPublicationYear "2013" @default.
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