"Phantom pregnancy," also known as pseudocyesis, is a condition in which a person experiences pregnancy symptoms but is not actually pregnant. There are several synonyms for this condition, including false pregnancy, spurious pregnancy, imagined pregnancy, and hysterical pregnancy. These terms all describe the same phenomenon: a person believes themselves to be pregnant, and their body responds with physical symptoms, including weight gain, missed periods, and even kicks and movement. Pseudocyesis can be caused by a combination of psychological and hormonal factors, and may be linked to underlying mental health conditions. While the experience is very real for those who suffer from it, treatment typically involves therapy and counseling to address underlying psychological factors and manage symptoms.