"Against the backdrop of a contentious presidential campaign in which abortion and even contraception were front-burner issues — to a degree unprecedented in recent memory — supporters of reproductive health and rights were able to block high-profile attacks on access to abortion in states as diverse as Alabama, Idaho, Minnesota, Pennsylvania and Virginia," Guttmacher wrote.
Of the restrictions enacted, seven came from Arizona, while Kansas, Louisiana, Oklahoma, South Dakota and Wisconsin each passed at least three.
New requirements mandate waiting periods, counseling and ultrasounds that are not medically necessary prior to abortions.
Arizona, Georgia and Louisiana also enacted measures to ban abortion at 20 weeks, before fetal viability.
2011 was considered a banner year for opponents of abortion rights after Republicans took control of statehouses across the county.
Read Guttmacher's detailed tally for 2012 here.