I finally remembered to take my nail/string out last night! It looks like we will have 6 mares foaling at our place (4 of our own, and 2 client mares). I used the nail/string on my 4 mares.
Chloe - filly
Teaka - colt
Bequest - filly
Polly - filly
I will update with the client mares once I get a chance to try it out. Last year I had 4 mares due that I did this on and it was correct on 3 out of the 4. I hope what it says this year is mostly correct too