Pseudocyesis and Delusion of Pregnancy are often conflated. Both presentations are associated with false beliefs of pregnancy in patients who are not pregnant. Pseudocyesis is associated with physiological changes of pregnancy such as amenorrhea, galactorrhea, abdominal distention, and hyperprolactinemia. Delusion of Pregnancy is not associated with physiological signs/changes. We describe a case to demonstrate the phenomenological and physiological differences between these entities and how these influence treatment considerations.

1.Phenomenology of Pseudocyesis vs Delusion of Pregnancy 2.Elucidate the physiological underpinnings of both 3.Treatment considerations

Comprehensive literature review following a 29-year-old-female with no known psychiatric history presenting to the emergency department with mixed complaints of twin-pregnancy, menorrhagia, and concern for threatened abortion. Psychiatry was consulted for decisional capacity to leave against-medical-advice due to concerns for ectopic pregnancy. Patient reported a recent ultrasound with fetal heartbeat and sensation of fetal “kicks”. She was concerned the menorrhagia was threatening her pregnancy. The patient appeared irritable, paranoid, endorsed ideas of reference and a fixed false belief that she was pregnant with twins, despite quantitative HCG, abdominal and transvaginal ultrasounds being negative. On examination, while there was vaginal bleeding, there were no stigmata of pregnancy.

Diagnosis- Delusion of Pregnancy.

Delusion of Pregnancy have been associated with polythematic content. Pseudocyesis may be confounded by conditions such as abdominal neoplasms, leiomyoma, and endocrinologic changes (eg- hyperprolactinemia). Potent D2R antagonists carry increased risk of hyperprolactinemia and subsequent galactorrhea which may paradoxically exacerbate misattributions of pregnancy. Careful consideration of psychotropic choice is therefore needed in the management of these conditions.

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A delusion of pregnancy in men has been rarely reported in psychiatric disorders. The literature on this delusion in male schizophrenia is limited. It was reported especially in medical conditions. In psychiatric disorders, it has been explained for a long time by psychodynamic theories.

To present a case of a pregnancy delusion in man associated temporally to neuroleptic-induced hyperprolactinemia and a review of literature of medical and psychological etiologies of this symptom

We presented a case of a pregnancy delusion in man associated temporally to neuroleptic-induced hyperprolactinemia and we elucidated through a review of literature of medical and psychological etiologies of this symptom.

Case report A 46-year-old man, unmarried, who had a mild intellectual disability and a 22-year history of schizophrenia. He was admitted to our hospital for psychotic relapse due to the interruption of his medication. This patient had been treated for years with long action injection medication. On admission he was disorganized, verbalizing a poorly-systematized fuzzy delirium. And he believed he was pregnant. Serum prolactin levels was 38 ng/ml (3-25ng/ml). He was put on Haldol decanoate 150mg/month, chlorpromazine 150mg/day, and diazepam 15mg/day.

The presentation of a delusion of pregnancy in man is rather infrequent. The delusion may have many social, psychological, and biological determinants to its genesis. This case highlights the importance of medical investigations notably the assay of prolactin in the assessment of patients who present with delusions of pregnancy.

No significant relationships.