Such proposals have gained little attention so far from lawmakers in Kansas or Missouri. But the National Right to Life Committee says 11 states have enacted laws requiring abortion providers to tell patients they have the right to see an ultrasound image of the embryo or fetus they are carrying.

Right to Life had its annual, three-day convention in Kansas City this week, attracting more than 1,000 leaders of local and state anti-abortion groups from across the nation. Mary Balch, director of the group's state legislative efforts, predicted that ultrasound legislation will be a growing trend.

"We believe the more information a woman has about the development of a child, the more likely she is to choose life," Balch said during an interview.

Critics see such legislation as an attempt by anti-abortion activists to have the state interfere in decisions between patients and doctors.

"It's her pregnancy. It's her decision. It's part of her health care. A decision to have an abortion is very personal, very private, very close to the heart," said Julie Burkhart, lobbyist for the Kansas abortion rights group ProKanDo.

This year, the Kansas House's Federal and State Affairs Committee sponsored a bill requiring abortion providers to give patients the option of having a sonogram and, if the patients can't afford it, have the state pick up the cost. The measure was assigned to a second committee, where it didn't have a hearing, but it remains alive for the 2008 session.

In Missouri, a proposal from Republican Rep. Jane Cunningham went even further. It would have required the abortion provider to show the sonogram to the patient before the procedure. However, her bill died without a hearing.

Balch and other Right to Life leaders said abortion opponents are interested in such legislation because they believe patients do not receive enough information about abortion procedures.

"We want this kind of information before we make this permanent, life-or-death decision," said Olivia Gans, who had an abortion in the early 1980s and now directs Right to Life's American Victims of Abortion project.

But Burkhart said abortion providers routinely use ultrasound equipment and already show images to patients who ask to see them.

She called the ultrasound bills "just another way in which to control women."