Publications by authors named "Octavio Mejia"
Article Synopsis
- - This study investigated how changes in prolactin (PRL) levels affect the resistance of sperm from ibex and mouflon to freezing processes, using drugs bromocriptine (BCR) and sulpiride (SLP) to manipulate PRL during different seasons.
- - BCR reduced PRL levels, leading to lower sperm motility in mouflons with slow-freezing and improved motility with ultra-rapid freezing, while SLP increased PRL and resulted in lower sperm viability and integrity in both species.
- - Results indicate that high PRL levels negatively impact sperm quality and cryoresistance, with varying effects on sperm head dimensions between ibex and mouflons.
Background: Recent studies have noted that the circulating testosterone concentration may affect the ability of spermatozoa to survive cryopreservation. However, few attempts to confirm such a relationship have been made. Wild ruminant species have very marked seasonal changes in their reproductive function and strong annual changes in their plasma testosterone concentration.
View Article and Find Full Text PDFSeventy six ewes were treated with 7.5, 12.5, 25 or 50μg of cloprostenol on day 6 or 9 post-estrus to compare the luteolytic efficiency of the PGF2α analogue at each stage and to evaluate if progesterone concentrations at the time of treatment affect such efficiency.
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