New mothers in New Jersey can expect to be screened for postpartum depression and receive education about the condition under a first-of-its-kind law that went into effect this month. The law requires doctors to educate expectant mothers and their families about the disorder and to screen new moms. The state isn’t mandating a particular screening method, but recommends that doctors use the Edinburgh Postnatal Depression Scale, which asks 10 simple questions about emotions. Several other states have launched awareness campaigns, including TV and radio spots, but New Jersey’s effort is by far the boldest, advocates say. Doctors and researchers say most new mothers experience occasional sadness and anxiety, known as the “baby blues,” that does not require treatment. Roughly 10 percent to 15 percent of new mothers suffer postpartum depression, a more serious condition which can affect a woman’s well-being and which, experts say, should be treated through therapy, group support or medication. New Jersey has roughly 115,000 births a year. The new law was championed by former Gov. Richard J. Codey and his wife, Mary Jo Codey, who had suffered from the disorder.