Let M be an ideal in K[x 1 , . . . , xn] (K is a field) generated by products of linear forms and containing a homogeneous regular sequence of some length. We prove that ideals containing M satisfy the Eisenbud-Green-Harris conjecture and moreover prove that the Cohen-Macaulay property is preserved. We conclude that monomial ideals satisfy this conjecture. We obtain that h-vector of Cohen-Macaulay simplicial complex ∆ is the h-vector of Cohen-Macaulay (a 1 − 1, . . . , at − 1)-balanced simplicial complex where t is the height of the Stanley-Reisner ideal of ∆ and (a 1 , . . . , at) is the type of some regular sequence contained in this ideal.