The air wars are intensifying among the Democratic field in the Massachusetts Senate special election.

State Attorney General Martha Coakley, the frontrunner for the Democratic nomination, announced the launch of her first television advertisement of the campaign Tuesday. The 30-second ad goes after the women’s vote, featuring a middle-aged woman who was denied health care claims, including coverage for her mammogram. Coakley, she says, helped her get her money back and go after the insurance company. Coakley appears in the ad to voice support for a “strong public option,” referring to a government-run insurance plan being pushed by Democratic constituencies.

The ad buy is statewide and is “robust,” in the words of Coakley spokeswoman Alex Zaroulis.