We have only lost 2 foals ever in the foaling process - both were dystocias. We had a filly born this morning who absolutely would not have gotten out of the sac had we not been there. It did not break, and mom didn't stand for about 10 minutes. When she did, placenta dropped out, not breaking from foal. We saw her go down on camera and were in the stall within a minute or so, foal was already delivered - and in the sac - when we got there. We have been watchful and fortunate enough to be there for nearly all the deliveries, or I'm sure we would have lost some that way. We have had a number of redbags, but have not lost a foal from it.
Jan