Sperm subpopulations influence the pregnancy rates in cattle

This study aimed to study the characteristics and subpopulations of spermatozoa from bulls with low and high reproductive performance based on pregnancy rates. Based on historical records of pregnancy rate from four farms, 24 bulls were selected. Two groups were established, with low pregnancy rates...

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Bibliographic Details
Published in:Reproduction in domestic animals 2021-08, Vol.56 (8), p.1117-1127
Main Authors: Hidalgo, Myrian Megumy Tsunokawa, Almeida, Ana Beatriz Marques de, Moraes, Fábio Lucas Zito de, Marubayashi, Rodrigo Yudi Palhaci, Souza, Fabiana Ferreira de, Barreiros, Thales Ricardo Rigo, Martins, Maria Isabel Mello
Format: Article
Language:English
Subjects:
Artificial insemination
bull
CASA system
Farms
Fertility
Fertilization
FTAI
Integrity
Membranes
Morphology
Pregnancy
Reproduction
Reproduction (biology)
semen
Sperm
Spermatozoa
Subpopulations
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Summary:This study aimed to study the characteristics and subpopulations of spermatozoa from bulls with low and high reproductive performance based on pregnancy rates. Based on historical records of pregnancy rate from four farms, 24 bulls were selected. Two groups were established, with low pregnancy rates (n = 12; LOW), including bulls that presented pregnancy rates 52.27% (52.27% to 69.64%), after fixed‐time artificial insemination (FTAI). The thawed sperm straws were analysed to sperm kinetics, morphology, plasma membrane integrity and sperm subpopulations. The LOW group exhibited a higher proportion of static cells (p 
ISSN:0936-6768
1439-0531
DOI:10.1111/rda.13955