The effect of uniaxial deformation on swollen gels is investigated. The elastic contribution is obtained by a extension of the modified Flory model proposed previously. Following Bastide, it is assumed that the deformation occurs by a process of topological rearrangements of the cross-link junctions. Consequently, the contracted junction affine model is used to describe the relationship between the macroscopic deformation and the resulting chain deformation. Using this simple approach, we examine the effect of deformation on the relative degree of swelling (Fg/Fgm) and the packing factor. © 1999 Elsevier Science Ltd. All rights reserved.