A single hormone injection will probably bring her to ovulation. I don't like to use hormones because of the extra handling and anesthesia required. However, the hormone itself is pretty safe. There are several choices of hormone to choose from including human chorionic gonadotropin (HCG), luteinizing hormone releasing hormone (LHRH), and acetone dried carp pituitary. However, Ovaprim by Syndel seems to be the most popular right now and is especially effective with carp. For more detail, see:
http://www.syndel.com/spawning/ovapr...ion_sheet.html
In the old days, any fishery professional could buy the material - but no more. In most places, you have to get it through a vet but we are fortunate to have an aquaculture extension agent who works through a vet and is approved to acquire the hormone and make it available to clientel. If there is a fish hatchery nearby, you might want to check with them.
-steve hopkins