Is there any benefit to using more than 1 straw of semen when breeding? Does that increase the chance of conception? I am talking about a cow who showed a great standing heat in the evening, and breeding her the next morning.
Not if your using both straws at the same time, there could be some advantage to breeding at two different times. For example we have one cow we breed at 12 hours and then at 18 cause she seemed to do better ai'ing here later in her cycle.