started ai today and ordered some sexed semen for the first 10 days, 68 euro approx for first timers and only 3 fr bulls available now at the moment so i,d say you,re right about getting the orders in, over 400 days calving interval here but the reason i,m going to try it is a ratio of 3 bulls to 1 fr heiferI have very good fertility here 371 day calving interval in a liquid milk herd. I got about 75% in calf to sexed of what it was used on.. I wouldn't be using a massive amount of it but the way fr bulls went this year it could be useful. Would want to be ordering it soon enough for this year