Philadelphia Preterm Prevention Project

Subjects will be randomized into either usual care or interconceptional intervention groups. If the subject is randomized into the intervention group, she will receive targeted interventions to reduce one of several risk factors: smoking, depression, infectious disease burden and maternal stress, and achieving an appropriate BMI. A woman who is randomized to the intervention group may receive interventions on one, two, three, four, or five of the targeted intervention methods, depending on her needs.