Fatores que interferem na concepção de receptoras de embrião bovino

Abstract

Embryo transfer is a worldwide reproductive biotechnique, which consists of using a recipient to generate a product from another animal, allowing the multiplication of the progeny of a female considered genetically superior on a larger scale, therefore the recipients become an item of extreme importance within an embryo transfer program. The objective of this review is to discuss some factors that interfere with the reproductive efficiency of bovine embryo recipients, such as corpus luteum size and quality, stage of development and embryo quality, receptor/embryo synchrony, difficulty in transposition of the cervix, site of inovulation, and synchronization protocols. Recipients must have a functional corpus luteum on the day of transfer, as well as be synchronized with embryonic age. Embryos of superior quality, as well as little manipulation of the reproductive tract, reflect in better efficiency of the technique. In synchronization protocols, variations in the drugs used, dosages, and days of administration may or may not interfere with conception rates.