Introduction The word couvade originated from the French verb couver, meaning to hatch, nest, or brood. Custom of Couvade or Couvade Syndrome (CS) is a poorly understood phenomenon observed since ancient times, in which the expectant father experiences somatic and psychological symptoms of pregnancy. Objectives Defining what is CS. Identifying possible origin. Hypothesizing causes. Identifying CS frequency. Methods PubMed database search, with "Couvade syndrome" keyword expression. Seven

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... s were selected among the best matches. Reference lists of articles were reviewed to identify additional articles. Results Currently, there are several views on this phenomenon, including religious, cultural, medical, psychoanalytic, and psychological. CS is used in Psychiatry to describe somatic symptoms resembling pregnancy and/or childbirth in expecting fathers, such as weight gain, diarrhea or constipation, toothache, and headache. Lipkin and Lamb (1982) studied 300 couples from New York: they diagnosed Couvade Syndrome in 22,5% of fathers. Nevertheless, Brennan et al. (2007) found different incidence rates of CS diagnose in different areas of the world: 20% in Sweden; 25–97% in United States; 61% in Thailand; 68% in China; 35% in Russia. Conclusions Whether CS constitutes a disease entity, or it should be considered a ritual or custom remains a matter of debate. Different rates of CS around the globe may indicate that culture plays an important role. It may be a way for fathers-to-be to cope with changes imposed by pregnancy in the mother and in the couple. Overall, it is a fascinating intersection between the physiological and psychological realms. Disclosure No significant relationships.