SAN JOSE — Costa Rica, a nation that takes pride in its respect for civil liberties, is being sued for failing to lift a ban on in-vitro fertilization (IVF), as it remains the only country in the Americas that prohibits the procedure. The Inter-American Commission on Human Rights said on Monday it will take Costa Rica to the Inter-American Court of Human Rights for not legalizing IVF after the commission twice extended its previous deadline for the country to do so. In-vitro fertilization was banned in Costa Rica in 2000 under pressure from the Catholic Church. Some couples have taken their cases to the Inter-American Court, which is based in Washington, and 50 couples have joined to file the petition. President Laura Chinchilla has made efforts to prevent the case from reaching the court, but she was met with sluggish action on the part of Costa Rican lawmakers.