Last Saturday was the estimated due date for our first calf of the season. I try to keep a good record of when the bull is introduced back in with the ladies, and when he's paying lots of extra attention to each one. Well, the weekend has come and gone, the cow has a nice large firm udder, but still we wait (impatiently). Meanwhile all I can do is Google calf pictures, walk the pasture, pet the ladies and do daily udder inspections, and worry.
Here's a good website for what to expect while calving, LEA-White Farms. They also have lots of other useful articles on other aspects of raising cattle. Enjoy, and hopefully we will have new calf pictures to share soon.