false pregnancy

American Heritage® Dictionary of the English Language, Fourth Edition

1. n. A condition that is usually psychosomatic but may be caused by a tumor or endocrine dysfunction, in which physical symptoms of pregnancy are manifested without conception. It may occur in both males and females but is much more common in females. Also called pseudocyesis, pseudopregnancy.

WordNet 3.0

1. n. physiological state in which a woman exhibits symptoms of pregnancy but is not pregnant