Abstract：
A number of potentials uses of Doppler ultrasonography have been explored in the last decades, both as research tools in reproductive physiology investigations and for the reproductive management of farm animals. The objective of this review was to address some of the recent strategies developed in fixed-time reproductive programs and resynchronization of ovulation in cattle, based on the evaluation of corpus luteum function by color-Doppler ultrasound imaging. Recent studies in dairy and beef cattle pointed out to a high accuracy when Doppler ultrasonography is used to assess the functionality of the corpus luteum and identify non-pregnant females at 20-24 days after breeding. Therefore, super-early resynchronization programs starting in the second week after timed-artificial insemination or embryo transfer have been developed and are being implemented in commercial assisted reproduction programs; thus, anticipating conception with proven semen or genetically superior embryos. In addition, assessment of corpus luteum blood perfusion can be used for identifying high fertility embryo recipients in fixed-time embryo transfer programs.
摘要：
在过去的几十年中，已经探索了多普勒超声检查的许多潜在用途，作为生殖生理学研究和农场动物生殖管理的研究工具。这篇评论的目的是解决在固定时间生殖计划和牛排卵再同步中开发的一些最新策略，基于彩色多普勒超声成像评价黄体功能。最近对奶牛和肉牛的研究指出，当使用多普勒超声检查来评估黄体的功能并在繁殖后20-24天识别未怀孕的雌性时，准确性很高。因此,超早期再同步计划在定时人工授精或胚胎移植后第二周开始，并在商业辅助生殖计划中实施；因此，用经过证实的精液或遗传优越的胚胎预测受孕。此外,黄体血液灌注评估可用于确定固定时间胚胎移植计划中的高生育力胚胎接受者.
