Sexed semen conception rates similar

DATA from Genus ABS suggests conception rates with sexed semen are improving and there is no significant difference in conception rate between different methods of sexed product.

The company examined the results of 49-day non-return rates (NRR) from over 20,000 inseminations carried out by Genus technicians. It discovered that sexed semen had a NRR of 70 per cent and conventional semen 74 per cent, a smaller difference than often rumoured.

When comparing sexed semen frozen in different countries, the data showed a 69 per cent NRR for semen frozen using the US system, and 70 per cent for the UK system.

NRR tends to be higher than some conception rates, as it assumes a cow is pregnant unless she has returned to service within 49 days and been repeat served by a Genus technician, whereas some will have been put to a stock bull or served by DIY AI. But Genus says it is confident this will not affect the results of this analysis.

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