Hi everyone ---
Thank you to everyone for their ideas, opinions, and suggestions. Here are the exact dates on what has happened thus far. Mare is 20 yrs old, and in excellent health. Was bred by AI in 2007, foaled a filly in 2008 after normal pregnancy and delivery. Did not breed her back in 2008. She is not, and has never been on Regumate. Mare came into a strong heat in May 18,19,20, 21,22,23. Was bred on the 23rd. Mare showed heat again on June 8,9,10,11,12. Mare was bred on the 11th, vet was out on the 12th. He did a culture, and at that time said that he could see that she had already ovulated, and this was 9 am. An ultrasound was done on the 24th which did not reveal any pregnancy, so a uterine flush was done and mare was put on 10 days of oral antibiotics for showing a positive staph infection. Mare has been checked regulalry to stallion ever since, and has shown no heat, or even the slightest interest in the stallion. The stallion is a large 2 yr old colt, and this is his first breeding experience. We are doing this live cover. I obtained a home pregnancy test late yesterday, and later this eve I will try to get a urine catch from the mare and see what it reveals. I will post again when I have the results.