[gemy]

Get a lawyer have them review the contract. You may have wiggle room there. Another potentiality have your vet examine her, with very clear instructions for his assessment of her health as it regards her being bred. Be open with what you signed up for on the contract. If in his medical opinion being bred puts this female at high risk then that might be another avenue to go as well. He will need to document his findings and prepare a formal report.

And you should never sign a contract with provisions in it that you don't agree with.