| 词汇 | oestrus |
| 释义 | oestrus noun[ U ] uk /ˈiː.strəs/ us /ˈes.trəs/ a UK spelling of estrus Examples of oestrusoestrus Females that had a regular oestrus cycle were mated with males of the same strain. Tamoxifen did, however, reduce the proportion of females exhibiting oestrus. Other parameter values have been investigated (re-entry into oestrus when the current offspring is 2 or 5 years old) but this results in only minor quantitative differences (results not shown). Avid binding would offer one explanation for the failure of repeated mating early in oestrus to displace a population of viable spermatozoa from the isthmus. Oestrus was induced in an adult female opossum by introduction of a male into her cage. These experiments emphasize the relation between periods of oestrus and periods of farrowing. While still prepubertal, vixens were about to cycle as were the breeding ones, with both groups in the same stage of the preparation for oestrus. These fourteen rats are not typical, however, since most female rats are not receptive to the male unless they are in oestrus. Individually marked tent-roosting bats were visually censused over the course of a 38-d interval spanning the postpartum oestrus period. Only 42 % of mice with late slow growth attain first oestrus by 56 days. Another effect of this practice consists in the diminution of the number of sows at farrowing, because fewer sows are observed in oestrus. Probabilities of natural insemination success were estimated according to the number of oestrus and the number of matings. There was no language but there was abundant food and unlimited copulation, once the human oestrus cycle had faded into extinction. When sows return into oestrus after mating they can be moved to another batch or culled depending on batch management strategy and culling policy. A fertile boar was always penned in the vicinity and the sows were checked twice daily by experienced personnel for spontaneous, behavioural oestrus. These examples are from corpora and from sources on the web. Any opinions in the examples do not represent the opinion of the Cambridge Dictionary editors or of Cambridge University Press or its licensors. |
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