Interesting topic in Cow Talk on Facebook. Do you preg? It evolved into methods.
I've been interested in biopryne blood draw. Turns out the test is $2.50/head at one nearby lab. Not sure on shipping or materials. I do like the flexibility of not having to schedule a vet.
Some other interesting things. A guy brings his cows in close and just observes who comes into heat. I like that if you have the space and time.
Anyways, especially large outfits, pregging would seemingly be pretty expensive. But, so can be feeding opens.