Sen. Brock Greenfield, R-Clark, thanked Sen. Deb Soholt, R-Sioux Falls, after the state Senate voted 29-6 Wednesday for legislation that would establish a certification system for midwives and create a professional midwives board within the state Department of Health. The legislation now heads to the House. Last year the Senate rejected a somewhat similar bill after the House had passed it by a solid margin. Soholt, a registered nurse, changed from an opponent to a supporter this year. Greenfield was the prime sponsor of the bill.