Inclusion Criteria for the case :  Pregnant patients Major Affiliated with social security Symptomatic or pauci-symptomatic dengue Biological confirmation of dengue fever  Inclusion Criteria for the control :  Pregnant patients Major Affiliated with social security Asymptomatic  Exclusion Criteria for the 2 group :  Multiple pregnancy Patient's refusal Protected persons: person deprived of liberty by judicial or administrative decision, minor, and person subject to a legal protection measure: guardianship or curators)