%0 Journal Article %T Invariants de Welschinger %A Alexandru Oancea %J Mathematics %D 2011 %I arXiv %X This is an overview of some of the invariants that were discovered by Welschinger in the context of enumerative real algebraic geometry. Their definition finds a natural setup in real symplectic geometry. In particular, they can be studied using techniques from symplectic field theory, of which we also give a sample. Welschinger invariants are real analogues of certain Gromov-Witten invariants. This article is an extended set of notes for a talk at the Bourbaki seminar in April 2011. %U http://arxiv.org/abs/1110.5397v1