Breeding season puts a lot of demands on cows. During this time she is expected to provide adequate nutrition for her calf while her body recovers from giving birth. Then she is expected to get back into estrus just before she is bred again. All of this is expected to occur within 90 days after calving to maintain a yearly calving interval.
This is the type of cycle that is expected in order for a cow to be considered profitable. If she does not provide a calf every year or 2 then she is not getting a return on what the producer is spending on her. With the ever-increasing input costs that producers have been seeing over the last year not getting a return on investment is not an option.
The key to getting your cows bred again is adequate nutrition. There are some considerations to look at in order to meet her nutritional demands. The things you should be looking at are the quality and quantity of forage consumed, her nutrient requirements, and understanding what feed options are available to you.