Thursday is Planned Parenthood's annual lobbying day and after the demonstration, the crowd fanned out to meet individually with legislators.
The Republican-controlled Legislature targeted Planned Parenthood in 2011, when it outlawed state funds going to organizations linked to abortion providers.
The Senate Education Committee has also begun mulling a bill barring Planned Parenthood from teaching sex education in public schools -- even though that only happens in rare cases around the state.
Native Texan and actress Stephanie March of "Law & Order: Special Victims Unit" fame told demonstrators: "I'm tired of Texas being crazy!" That drew sustained applause and hollering.
Take ABC13 with you!
Download our free apps for iPhone, iPad, Android and Blackberry devices