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From the beginning of gestation oocyte competence is often a large factor impacting fertility as the dam contributes all mRNA for initial embryo development. Other factors contributing to early embryonic infertility include hormonal concentration and heat stress. After the embryo enters the uterus, it becomes critical for the uterus to be receptive to the developing conceptus. The embryo then begins to elongate and secrete interferon-tau to initiate maternal recognition of pregnancy; a requirement to establish and maintain bovine pregnancies. After a pregnancy completes these steps, placentation actively begins around day 22 of pregnancy and lasts until organogenesis. The fetal phase follows the embryonic phase where disease and\/or toxins are often the cause of pregnancy failure at this period. However, fetal mortality has been reported to occur in less than 10% of pregnancies. Understanding of the many factors influencing infertility needs to be further investigated to increase pregnancy success in beef cattle.<\/jats:p>","DOI":"10.1071\/rd22206","type":"journal-article","created":{"date-parts":[[2022,10,20]],"date-time":"2022-10-20T23:47:27Z","timestamp":1666309647000},"page":"70-83","source":"Crossref","is-referenced-by-count":18,"title":["Decisive points for pregnancy losses in beef cattle"],"prefix":"10.1071","volume":"35","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-2429-0893","authenticated-orcid":true,"given":"B. 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