At least two states have taken steps to put tighter restrictions on abortion clinics.

In Kansas, medical professionals who perform late-term abortions must clearly state the medical reasons why an abortion after 21 weeks is necessary to save the mother's life or prevent permanent harm.

The Sunflower State's new governor Sam Brownback, a Republican, is also an ardent foe of abortion who has made clear he will sign restrictive measures that his Democratic predecessors vetoed.

In Texas, Gov. Rick Perry has fast-tracked legislation requiring women to have an ultrasound first if they're seeking an abortion.

"We are seeing a cultural shift toward protecting life and rolling back the tide of unrestricted abortions," Charmaine Yoest, president of Americans United for Life, said in a statement.