I had a heifer go cystic 5 or 6 years ago. I called the vet, he palpated her, told me what to do, I followed his instructions.....baby every year since.
had a cow that was cystic and bred every other year. we found out she was cystic and tried cysterellin as directed by the vet. she showed up open again and we shipped her because it didn't seem to help us.