Haytrucker
Don't know where you are located, but remember, a cow needs lots of nourishment in the last tri-mester of pregnancy. And even more when she calves. If she calves on green grass, it will save you a lot in feed and she should cycle and breed back easier. Calves will do good and should stop lots of sickness problems. Look at when deer have fawns. Nature probably has it figured out pretty good.
I moved my calving date back almost a month one year, from first of March to first of April. I sweated and worried all that next year, worrying that I would have smaller, lighter calves. Ended up selling the most even set and heaviest calves of my life, that next fall.
Don't worry, be happy! :lol: