TOPEKA, Kan. (AP) -- The Kansas House is preparing to debate legislation blocking tax breaks for abortion providers and barring public schools from using sex education instruction from groups that provide abortion services.

Abortion-rights advocates consider the bill on the chamber's Tuesday agenda the biggest threat in Kansas this year to access to abortion services.

Supporters contend the measure will lessen the state's entanglement with a procedure that many residents find objectionable.

The bill would prevent groups providing abortions from receiving tax exemptions or credits that go to other nonprofit groups or health care providers. It would also bar women who claim income tax deductions for medical expenses from including the cost of abortion services.

The legislation also would prohibit any abortion provider from furnishing materials or instructors for public schools' sex education classes.