Thank you for the reply. I'm curious because I own a 2007 model high % maine cow. Her heifer calves make good club calf mommas but her steers are just average. Being a 2007 model, we'd like to get as many heifers out of her before she is done. Yes we have considered flushing her but we haven't decided just yet.B K said:In general you will see about a 10-15% decrease while using sexed semen vs conventional.