Think about these model sentences:
These rights establish women's status.
These rights are those that establish women's status.
These rights are there, establishing women's status.
In the last sentence, "establishing" is used in an adverbial clause. This is a typical application for an ing-form such as "establishing."
In 1, "establish" is a main verb, and its form (in the "indicative mood") is appropriate for that. In 2, you have the same in the relative subordinate. You can't use an ing-form in such constructs.
If this is more than you understand, please go and ask someone for a translation in your own language (both for sentences and my comments). Sorry, I will not explain them to you, as they are all pretty basic.