Author(s): PUGLIESI, G.; SILVA, A. G. da; VIANA, J. H. M.; SIQUEIRA, L. G. B.

Summary: 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 fixedtime 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 fixedtime embryo transfer programs.

Publication year: 2023

Types of publication: Journal article

Unit: Embrapa Genetic Resources & Biotechnology

Keywords: Bovino, Embrião Animal, Função lútea, Progesterona, Reprodução Animal, Ultrassom