The sign out front advertises free pregnancy tests, information about abortion and testing for sexually transmitted diseases. But it is not an abortion clinic — it is home to the Alpha Center, an organization in Sioux Falls, S.D., dedicated to encouraging women to bring their babies to term.

A law signed by Gov. Dennis Daugaard on Tuesday makes the state the first to require women who are seeking abortions to first attend a consultation at such “pregnancy help centers,” to learn what assistance is available “to help the mother keep and care for her child.”

The legislation, which passed easily in a state Legislature where Republicans outnumber Democrats by more than 3 to 1, also establishes the nation’s longest waiting period — three days — after an initial visit with an abortion provider before the procedure can be done. It makes exceptions for medical emergencies, but not for rape or incest.

Many states require counseling from doctors or other clinic staff members before an abortion to cover topics like health risks. What makes the new South Dakota law different is that the mandated counseling will come from people whose central qualification is that they are opposed to abortion.