Do you breed back at foal heat or 30 day heat

I thought there wa a protocol for delaying the time for them to come in foal heat by a few days --allowing the mare to recover a few more days which dramatically increased the success rate for pregancy when breeding on the foal heat. Maybe kathy will comment? here is from the website.

http://www.equine-reproduction.com/articles/foalheat.htm

We wait for the 30 day heat. I feel like the mares are still healing and cleaning out on the foal heat and it really isn’t that much of a wait till 30 days. Plus it keeps them on a consistent schedule. We have had very good luck with the 30 day heat using 1 dose of frozen.

I do many times but not if my mare doesn’t culture clean or has issues. Also, not if I am paying a bunch of money or if the baby has to go somewhere.