QuickStats: Smoking Cessation* During Pregnancy - 46 States and the District of Columbia, 2014.
In 2014, 20.6% of pregnant women who smoked cigarettes during the first or second trimester, in a reporting area of 46 states and the District of Columbia, stopped smoking during pregnancy. Women in three states, South Dakota (31.3%), California (31.2%) and New Mexico (30.2%), as well as the District of Columbia (41.5%), reported the highest cessation rates during pregnancy. Kentucky (11.4%) and Maine (11.6%) reported the lowest cessation rates; cessation rates were generally lower for states in the Southeast. The reporting area included 3,819,113 births and represented 95% of all U.S. births in 2014.