A crisis pregnancy center in Silver Spring has become the second group in Maryland to sue a Washington-area government over laws that pro-lifers say are part of a national campaign to snuff out anti-abortion speech.

Centro Tepeyac Women's Center, a 20-year-old Catholic agency on Apple Avenue, sued Montgomery County last week at U.S. District Court in Greenbelt over a Feb. 2 vote by the County Council that created a law requiring crisis pregnancy centers to post certain signs in English and Spanish...