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Heart Choice (Celta's HeartMates, Book 4) (edition 2005)
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Amazon.com Product Description (ISBN 0425203964, Mass Market Paperback)
On the planet of Celta, where psychic talents thrive and desires flourish, Straif Blackthorne is the last of his kind. After his family dies due to a genetic disorder, Straif is determined to find a cure and rebuild his heritage. Nothing else matters--until he meets Mitchella Clover. But Straif cannot give Mitchella his heart, for she is unable to bear children. Only when tragedy threatens to destroy them do they realize what truly matters, and what they truly mean to each other.
(retrieved from Amazon Sat, 05 Jan 2013 19:47:14 -0500)
Straif Blackthorn, the last in his bloodline due to a genetic disorder, vows to find a cure so that he can rebuild his heritage but finds his mission thwarted by Mitchella Clover, with whom he falls in love but refuses to pursue because she cannot bear children.
(summary from another edition)