The RTS influenced both the number of beef heifers that became pregnant during the breeding season and the time
at which they become pregnant. Furthermore, heifers bred by NSO required more time to become pregnant than their
counterparts in herds that used timed AI. The application of RTS system is reliant on the use of synchronization protocol.
The application of RTS for selection may plausibly remove precocious females with lower RTS. On the contrary,application of RTS would help select heifers that will become pregnant earlier in breeding season.