The term Pseudocyesis refers to a false sensation of being pregnant in a woman who is not. In mammals pseudocyesis is called pseudopregnancy; however, in humans, it is termed Pseudocyesis.
Pseudocyesis is often associated with clinical and sub-clinical signs and symptoms associated with a normal pregnancy.
Pseudopregnancy is common in mice and some other mammals and much less prevalent in humans.
It is still not determined whether or not Pseudocyesis is primarily caused by endocrine problems, or purely psychological in orgin.
It is however, recognised as a definite disorder that does occur in a small number of woman.