The reproductive success of bovine sperm after sex-sorting: a meta-analysis

Abstract In the three decades since its inception, the sex-sorting technology has progressed significantly. However, field studies report conflicting findings regarding reproductive outcomes. Therefore, we conducted this meta-analysis of all trials published between 1999 and 2021. Non-return rates a...

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Autores principales:	Sven Reese, Miguel Camara Pirez, Heather Steele, Sabine Kölle
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/9999b0f627994504bc0017436c1b5730
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spelling	oai:doaj.org-article:9999b0f627994504bc0017436c1b57302021-12-02T15:29:03ZThe reproductive success of bovine sperm after sex-sorting: a meta-analysis10.1038/s41598-021-96834-22045-2322https://doaj.org/article/9999b0f627994504bc0017436c1b57302021-08-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-96834-2https://doaj.org/toc/2045-2322Abstract In the three decades since its inception, the sex-sorting technology has progressed significantly. However, field studies report conflicting findings regarding reproductive outcomes. Therefore, we conducted this meta-analysis of all trials published between 1999 and 2021. Non-return rates after 24 or 60 d (NRR 24/60), pregnancy, calving, abortion, and stillbirth rates were compared after AI with sex-sorted vs non-sorted sperm. Additionally, the impact of recent developments in the sex-sorting technology was assessed. Of 860 studies found, 45 studies (72 trials) provided extractable data and were included. Overall, the results of this meta-analysis provided evidence that the NRR 24/60 was diminished by 13%, pregnancy rates were reduced by 23% (25% cows, 21% heifers) and calving rates were reduced by 24% when using sex-sorted sperm. Enhancing the dosage to 4 million sex-sorted sperm/straw (including recent improvements, high vs low dose) as well as using fresh sex-sorted sperm (sorted vs non-sorted) increased pregnancy rate ratios by 7 percentage points. The refinement of the sex-sorting technology after 2015 resulted in a lowered reduction of pregnancy and calving rate of 19% and 23%, respectively. Whereas abortion rates were similar, the stillbirth of male calves was increased by 6.3%.Sven ReeseMiguel Camara PirezHeather SteeleSabine KölleNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-18 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Sven Reese Miguel Camara Pirez Heather Steele Sabine Kölle The reproductive success of bovine sperm after sex-sorting: a meta-analysis
description	Abstract In the three decades since its inception, the sex-sorting technology has progressed significantly. However, field studies report conflicting findings regarding reproductive outcomes. Therefore, we conducted this meta-analysis of all trials published between 1999 and 2021. Non-return rates after 24 or 60 d (NRR 24/60), pregnancy, calving, abortion, and stillbirth rates were compared after AI with sex-sorted vs non-sorted sperm. Additionally, the impact of recent developments in the sex-sorting technology was assessed. Of 860 studies found, 45 studies (72 trials) provided extractable data and were included. Overall, the results of this meta-analysis provided evidence that the NRR 24/60 was diminished by 13%, pregnancy rates were reduced by 23% (25% cows, 21% heifers) and calving rates were reduced by 24% when using sex-sorted sperm. Enhancing the dosage to 4 million sex-sorted sperm/straw (including recent improvements, high vs low dose) as well as using fresh sex-sorted sperm (sorted vs non-sorted) increased pregnancy rate ratios by 7 percentage points. The refinement of the sex-sorting technology after 2015 resulted in a lowered reduction of pregnancy and calving rate of 19% and 23%, respectively. Whereas abortion rates were similar, the stillbirth of male calves was increased by 6.3%.
format	article
author	Sven Reese Miguel Camara Pirez Heather Steele Sabine Kölle
author_facet	Sven Reese Miguel Camara Pirez Heather Steele Sabine Kölle
author_sort	Sven Reese
title	The reproductive success of bovine sperm after sex-sorting: a meta-analysis
title_short	The reproductive success of bovine sperm after sex-sorting: a meta-analysis
title_full	The reproductive success of bovine sperm after sex-sorting: a meta-analysis
title_fullStr	The reproductive success of bovine sperm after sex-sorting: a meta-analysis
title_full_unstemmed	The reproductive success of bovine sperm after sex-sorting: a meta-analysis
title_sort	reproductive success of bovine sperm after sex-sorting: a meta-analysis
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/9999b0f627994504bc0017436c1b5730
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The reproductive success of bovine sperm after sex-sorting: a meta-analysis

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