did she did participate in other conventions too?
Yes, World Anti-Slavery Convention.
Elizabeth Cady Stanton
World Anti-Slavery Convention 
this was the first public meeting about women's rights held in the united states The Seneca Falls Convention when was this convention held? It spanned two days over July 19–20, 1848. and where was it held? Wesleyan Chapel which matters were discussed in the first day of the convention? The question of whether men's signatures would be sought for the Declaration was discussed. how the religious people react to this convention? On Sunday, July 23, many who had attended, and more who had not, attacked the Convention, the Declaration of Sentiments, and the resolutions. what role did newspaper play during that time? Local newspapers printed reports of the convention, some positive, others not. can you name some famous personality involved in this convention? Elizabeth Cady Stanton, Lucretia Mott and Fredrick Douglass who is the first one? She was a leader of the women's rights movement in the U.S. during the mid- to late-1800s. where was she from? Johnstown, New York
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Elizabeth Cady Stanton [SEP] World Anti-Slavery Convention
While on their honeymoon in England in 1840, the Stantons attended the World Anti-Slavery Convention in London. Elizabeth was appalled by the convention's male delegates, who voted to prevent women from participating even if they had been appointed as delegates of their respective abolitionist societies. The men required the women to sit in a separate section, hidden by curtains from the convention's proceedings. William Lloyd Garrison, a prominent American abolitionist and supporter of women's rights who arrived after the vote had been taken, refused to sit with the men and sat with the women instead. Lucretia Mott, a Quaker minister, abolitionist and women's rights advocate, was one of the women who had been sent as a delegate.